25878777102 has 32 divisors (see below), whose sum is σ = 60891242400. Its totient is φ = 8118831744.

The previous prime is 25878777077. The next prime is 25878777139. The reversal of 25878777102 is 20177787852.

It is a super-2 number, since 2×25878777102² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14094277 + ... + 14096112.

It is an arithmetic number, because the mean of its divisors is an integer number (1902851325).

Almost surely, 2^25878777102 is an apocalyptic number.

25878777102 is an abundant number, since it is smaller than the sum of its proper divisors (35012465298).

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

25878777102 is a wasteful number, since it uses less digits than its factorization.

25878777102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28190417 (or 28190411 counting only the distinct ones).

The product of its (nonzero) digits is 3073280, while the sum is 54.

The spelling of 25878777102 in words is "twenty-five billion, eight hundred seventy-eight million, seven hundred seventy-seven thousand, one hundred two".