25632744478 has 32 divisors (see below), whose sum is σ = 42705358560. Its totient is φ = 11441295360.

The previous prime is 25632744461. The next prime is 25632744481. The reversal of 25632744478 is 87444723652.

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, 332926 + ... + 402622.

It is an arithmetic number, because the mean of its divisors is an integer number (1334542455).

Almost surely, 2^25632744478 is an apocalyptic number.

25632744478 is a deficient number, since it is larger than the sum of its proper divisors (17072614082).

25632744478 is a wasteful number, since it uses less digits than its factorization.

25632744478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70012.

The product of its digits is 9031680, while the sum is 52.

The spelling of 25632744478 in words is "twenty-five billion, six hundred thirty-two million, seven hundred forty-four thousand, four hundred seventy-eight".