655641456065 has 16 divisors (see below), whose sum is σ = 794844931536. Its totient is φ = 519133440000.

The previous prime is 655641456031. The next prime is 655641456073. The reversal of 655641456065 is 560654146556.

It can be written as a sum of positive squares in 8 ways, for example, as 158492368321 + 497149087744 = 398111^2 + 705088^2 .

It is a de Polignac number, because none of the positive numbers 2^k-655641456065 is a prime.

It is a super-2 number, since 2×655641456065² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 655641455998 and 655641456016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1182749 + ... + 1646261.

It is an arithmetic number, because the mean of its divisors is an integer number (49677808221).

Almost surely, 2^655641456065 is an apocalyptic number.

It is an amenable number.

655641456065 is a deficient number, since it is larger than the sum of its proper divisors (139203475471).

655641456065 is a wasteful number, since it uses less digits than its factorization.

655641456065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466420.

The product of its (nonzero) digits is 12960000, while the sum is 53.

The spelling of 655641456065 in words is "six hundred fifty-five billion, six hundred forty-one million, four hundred fifty-six thousand, sixty-five".