9911255525 has 12 divisors (see below), whose sum is σ = 12348209664. Its totient is φ = 7891422000.

The previous prime is 9911255507. The next prime is 9911255533. The reversal of 9911255525 is 5255521199.

It is not a de Polignac number, because 9911255525 - 2⁸ = 9911255269 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 934181 + ... + 944730.

It is an arithmetic number, because the mean of its divisors is an integer number (1029017472).

Almost surely, 2^9911255525 is an apocalyptic number.

It is an amenable number.

9911255525 is a deficient number, since it is larger than the sum of its proper divisors (2436954139).

9911255525 is a wasteful number, since it uses less digits than its factorization.

9911255525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879132 (or 1879127 counting only the distinct ones).

The product of its digits is 202500, while the sum is 44.

The square root of 9911255525 is about 99555.2887846748. The cubic root of 9911255525 is about 2148.0426046506.

The spelling of 9911255525 in words is "nine billion, nine hundred eleven million, two hundred fifty-five thousand, five hundred twenty-five".