655523343325557 has 20 divisors (see below), whose sum is σ = 1119129799540896. Its totient is φ = 374584767614280.

The previous prime is 655523343325483. The next prime is 655523343325579. The reversal of 655523343325557 is 755523343325556.

655523343325557 is a `hidden beast` number, since 6 + 5 + 5 + 5 + 2 + 3 + 3 + 43 + 32 + 5 + 557 = 666.

It is not a de Polignac number, because 655523343325557 - 2⁷ = 655523343325429 is a prime.

It is a super-3 number, since 3×655523343325557³ (a number of 45 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 655523343325494 and 655523343325503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655523343325597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 578062912419 + ... + 578062913552.

Almost surely, 2^{655523343325557} is an apocalyptic number.

It is an amenable number.

655523343325557 is a deficient number, since it is larger than the sum of its proper divisors (463606456215339).

655523343325557 is a wasteful number, since it uses less digits than its factorization.

655523343325557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156125825990 (or 1156125825981 counting only the distinct ones).

The product of its digits is 850500000, while the sum is 63.

Subtracting 655523343325557 from its reverse (755523343325556), we obtain a palindrome (99999999999999).

The spelling of 655523343325557 in words is "six hundred fifty-five trillion, five hundred twenty-three billion, three hundred forty-three million, three hundred twenty-five thousand, five hundred fifty-seven".