255526433661 has 16 divisors (see below), whose sum is σ = 341381658816. Its totient is φ = 170011326336.

The previous prime is 255526433651. The next prime is 255526433663. The reversal of 255526433661 is 166334625552.

It is a happy number.

It is not a de Polignac number, because 255526433661 - 2²⁷ = 255392215933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255526433661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255526433663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4364961 + ... + 4423113.

It is an arithmetic number, because the mean of its divisors is an integer number (21336353676).

Almost surely, 2^255526433661 is an apocalyptic number.

It is an amenable number.

255526433661 is a deficient number, since it is larger than the sum of its proper divisors (85855225155).

255526433661 is a wasteful number, since it uses less digits than its factorization.

255526433661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61052.

The product of its digits is 3888000, while the sum is 48.

The spelling of 255526433661 in words is "two hundred fifty-five billion, five hundred twenty-six million, four hundred thirty-three thousand, six hundred sixty-one".