655402303204557 has 4 divisors (see below), whose sum is σ = 873869737606080. Its totient is φ = 436934868803036.

The previous prime is 655402303204553. The next prime is 655402303204631. The reversal of 655402303204557 is 755402303204556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 655402303204557 - 2² = 655402303204553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655402303204553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109233717200757 + ... + 109233717200762.

It is an arithmetic number, because the mean of its divisors is an integer number (218467434401520).

Almost surely, 2^{655402303204557} is an apocalyptic number.

It is an amenable number.

655402303204557 is a deficient number, since it is larger than the sum of its proper divisors (218467434401523).

655402303204557 is a wasteful number, since it uses less digits than its factorization.

655402303204557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218467434401522.

The product of its (nonzero) digits is 15120000, while the sum is 51.

Subtracting 655402303204557 from its reverse (755402303204556), we obtain a palindrome (99999999999999).

The spelling of 655402303204557 in words is "six hundred fifty-five trillion, four hundred two billion, three hundred three million, two hundred four thousand, five hundred fifty-seven".