25414504521 has 32 divisors (see below), whose sum is σ = 39469854720. Its totient is φ = 14245773696.

The previous prime is 25414504517. The next prime is 25414504529. The reversal of 25414504521 is 12540541452.

It is a happy number.

It is not a de Polignac number, because 25414504521 - 2² = 25414504517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25414504529) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298485 + ... + 374061.

It is an arithmetic number, because the mean of its divisors is an integer number (1233432960).

Almost surely, 2^25414504521 is an apocalyptic number.

25414504521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25414504521 is a deficient number, since it is larger than the sum of its proper divisors (14055350199).

25414504521 is a wasteful number, since it uses less digits than its factorization.

25414504521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75893.

The product of its (nonzero) digits is 32000, while the sum is 33.

It can be divided in two parts, 25414 and 504521, that added together give a triangular number (529935 = T₁₀₂₉).

The spelling of 25414504521 in words is "twenty-five billion, four hundred fourteen million, five hundred four thousand, five hundred twenty-one".