25404390534 has 16 divisors (see below), whose sum is σ = 53482927680. Its totient is φ = 8022439080.

The previous prime is 25404390511. The next prime is 25404390563. The reversal of 25404390534 is 43509340452.

It is a junction number, because it is equal to n+sod(n) for n = 25404390492 and 25404390501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111422652 + ... + 111422879.

It is an arithmetic number, because the mean of its divisors is an integer number (3342682980).

Almost surely, 2^25404390534 is an apocalyptic number.

25404390534 is an abundant number, since it is smaller than the sum of its proper divisors (28078537146).

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

25404390534 is a wasteful number, since it uses less digits than its factorization.

25404390534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222845555.

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 25404390534 in words is "twenty-five billion, four hundred four million, three hundred ninety thousand, five hundred thirty-four".