25401421404 has 72 divisors (see below), whose sum is σ = 67621648640. Its totient is φ = 8017576992.

The previous prime is 25401421387. The next prime is 25401421427. The reversal of 25401421404 is 40412410452.

25401421404 is a `hidden beast` number, since 254 + 0 + 1 + 4 + 2 + 1 + 404 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1597437 + ... + 1613259.

Almost surely, 2^25401421404 is an apocalyptic number.

It is an amenable number.

25401421404 is an abundant number, since it is smaller than the sum of its proper divisors (42220227236).

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

25401421404 is a wasteful number, since it uses less digits than its factorization.

25401421404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18199 (or 18194 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 25401421404 its reverse (40412410452), we get a palindrome (65813831856).

The spelling of 25401421404 in words is "twenty-five billion, four hundred one million, four hundred twenty-one thousand, four hundred four".