25478632554 has 32 divisors (see below), whose sum is σ = 51304942080. Its totient is φ = 8435016432.

The previous prime is 25478632549. The next prime is 25478632603. The reversal of 25478632554 is 45523687452.

It is a junction number, because it is equal to n+sod(n) for n = 25478632497 and 25478632506.

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, 1275657 + ... + 1295475.

It is an arithmetic number, because the mean of its divisors is an integer number (1603279440).

Almost surely, 2^25478632554 is an apocalyptic number.

25478632554 is an abundant number, since it is smaller than the sum of its proper divisors (25826309526).

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

25478632554 is a wasteful number, since it uses less digits than its factorization.

25478632554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21274.

The product of its digits is 8064000, while the sum is 51.

The spelling of 25478632554 in words is "twenty-five billion, four hundred seventy-eight million, six hundred thirty-two thousand, five hundred fifty-four".