625550255535 has 128 divisors (see below), whose sum is σ = 1102425292800. Its totient is φ = 301653780480.

The previous prime is 625550255513. The next prime is 625550255557. The reversal of 625550255535 is 535552055526.

It is an interprime number because it is at equal distance from previous prime (625550255513) and next prime (625550255557).

It is not a de Polignac number, because 625550255535 - 2²¹ = 625548158383 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 169478040 + ... + 169481730.

It is an arithmetic number, because the mean of its divisors is an integer number (8612697600).

Almost surely, 2^625550255535 is an apocalyptic number.

625550255535 is a deficient number, since it is larger than the sum of its proper divisors (476875037265).

625550255535 is a wasteful number, since it uses less digits than its factorization.

625550255535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021.

The product of its (nonzero) digits is 5625000, while the sum is 48.

Subtracting from 625550255535 its reverse (535552055526), we obtain a square (89998200009 = 299997²).

The spelling of 625550255535 in words is "six hundred twenty-five billion, five hundred fifty million, two hundred fifty-five thousand, five hundred thirty-five".