25220515401025 has 96 divisors (see below), whose sum is σ = 36445584476160. Its totient is φ = 16956053184000.

The previous prime is 25220515401017. The next prime is 25220515401049. The reversal of 25220515401025 is 52010451502252.

It is not a de Polignac number, because 25220515401025 - 2³ = 25220515401017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2738676621 + ... + 2738685829.

It is an arithmetic number, because the mean of its divisors is an integer number (379641504960).

Almost surely, 2^{25220515401025} is an apocalyptic number.

25220515401025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25220515401025 is a deficient number, since it is larger than the sum of its proper divisors (11225069075135).

25220515401025 is a wasteful number, since it uses less digits than its factorization.

25220515401025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10495 (or 10490 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

Adding to 25220515401025 its reverse (52010451502252), we get a palindrome (77230966903277).

The spelling of 25220515401025 in words is "twenty-five trillion, two hundred twenty billion, five hundred fifteen million, four hundred one thousand, twenty-five".