255551625438 has 32 divisors (see below), whose sum is σ = 519839856000. Its totient is φ = 83728184736.

The previous prime is 255551625437. The next prime is 255551625473. The reversal of 255551625438 is 834526155552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255551625437) 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, 2643988 + ... + 2738936.

It is an arithmetic number, because the mean of its divisors is an integer number (16244995500).

Almost surely, 2^255551625438 is an apocalyptic number.

255551625438 is an abundant number, since it is smaller than the sum of its proper divisors (264288230562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255551625438 is a wasteful number, since it uses less digits than its factorization.

255551625438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102616.

The product of its digits is 7200000, while the sum is 51.

The spelling of 255551625438 in words is "two hundred fifty-five billion, five hundred fifty-one million, six hundred twenty-five thousand, four hundred thirty-eight".