255386264661 has 32 divisors (see below), whose sum is σ = 412829212800. Its totient is φ = 154748154240.

The previous prime is 255386264597. The next prime is 255386264681. The reversal of 255386264661 is 166462683552.

255386264661 is a `hidden beast` number, since 2 + 5 + 5 + 3 + 8 + 626 + 4 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 255386264661 - 2⁶ = 255386264597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255386264598 and 255386264607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255386264681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1423185 + ... + 1592553.

It is an arithmetic number, because the mean of its divisors is an integer number (12900912900).

Almost surely, 2^255386264661 is an apocalyptic number.

It is an amenable number.

255386264661 is a deficient number, since it is larger than the sum of its proper divisors (157442948139).

255386264661 is a wasteful number, since it uses less digits than its factorization.

255386264661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174466 (or 174460 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 54.

The spelling of 255386264661 in words is "two hundred fifty-five billion, three hundred eighty-six million, two hundred sixty-four thousand, six hundred sixty-one".