855399596025 has 24 divisors (see below), whose sum is σ = 1523049949120. Its totient is φ = 421119800640.

The previous prime is 855399595993. The next prime is 855399596053. The reversal of 855399596025 is 520695993558.

It is not a de Polignac number, because 855399596025 - 2⁵ = 855399595993 is a prime.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 438665485 + ... + 438667434.

Almost surely, 2^855399596025 is an apocalyptic number.

It is an amenable number.

855399596025 is a deficient number, since it is larger than the sum of its proper divisors (667650353095).

855399596025 is a wasteful number, since it uses less digits than its factorization.

855399596025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877332945 (or 877332940 counting only the distinct ones).

The product of its (nonzero) digits is 131220000, while the sum is 66.

The spelling of 855399596025 in words is "eight hundred fifty-five billion, three hundred ninety-nine million, five hundred ninety-six thousand, twenty-five".