25140432521 has 12 divisors (see below), whose sum is σ = 27124844400. Its totient is φ = 23236313760.

The previous prime is 25140432511. The next prime is 25140432557. The reversal of 25140432521 is 12523404152.

It is not a de Polignac number, because 25140432521 - 2²² = 25136238217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25140432511) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 361631 + ... + 425508.

It is an arithmetic number, because the mean of its divisors is an integer number (2260403700).

Almost surely, 2^25140432521 is an apocalyptic number.

It is an amenable number.

25140432521 is a deficient number, since it is larger than the sum of its proper divisors (1984411879).

25140432521 is an equidigital number, since it uses as much as digits as its factorization.

25140432521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787240 (or 787199 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 25140432521 its reverse (12523404152), we get a palindrome (37663836673).

The spelling of 25140432521 in words is "twenty-five billion, one hundred forty million, four hundred thirty-two thousand, five hundred twenty-one".