25918352634 has 32 divisors (see below), whose sum is σ = 51939118080. Its totient is φ = 8622402992.

The previous prime is 25918352623. The next prime is 25918352639. The reversal of 25918352634 is 43625381952.

It is a super-2 number, since 2×25918352634² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25918352639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10190767 + ... + 10193309.

It is an arithmetic number, because the mean of its divisors is an integer number (1623097440).

Almost surely, 2^25918352634 is an apocalyptic number.

25918352634 is an abundant number, since it is smaller than the sum of its proper divisors (26020765446).

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

25918352634 is a wasteful number, since it uses less digits than its factorization.

25918352634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5234.

The product of its digits is 1555200, while the sum is 48.

The spelling of 25918352634 in words is "twenty-five billion, nine hundred eighteen million, three hundred fifty-two thousand, six hundred thirty-four".