25134977850 has 24 divisors (see below), whose sum is σ = 62334745440. Its totient is φ = 6702660720.

The previous prime is 25134977839. The next prime is 25134977863. The reversal of 25134977850 is 5877943152.

It is a super-2 number, since 2×25134977850² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25134977793 and 25134977802.

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, 83783110 + ... + 83783409.

It is an arithmetic number, because the mean of its divisors is an integer number (2597281060).

Almost surely, 2^25134977850 is an apocalyptic number.

25134977850 is an abundant number, since it is smaller than the sum of its proper divisors (37199767590).

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

25134977850 is a wasteful number, since it uses less digits than its factorization.

25134977850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167566534 (or 167566529 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 51.

The spelling of 25134977850 in words is "twenty-five billion, one hundred thirty-four million, nine hundred seventy-seven thousand, eight hundred fifty".