25451212402 has 48 divisors (see below), whose sum is σ = 48926903040. Its totient is φ = 9817836000.

The previous prime is 25451212399. The next prime is 25451212417. The reversal of 25451212402 is 20421215452.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8002 + ... + 225757.

It is an arithmetic number, because the mean of its divisors is an integer number (1019310480).

Almost surely, 2^25451212402 is an apocalyptic number.

25451212402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25451212402 is a deficient number, since it is larger than the sum of its proper divisors (23475690638).

25451212402 is a wasteful number, since it uses less digits than its factorization.

25451212402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233887 (or 233880 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 25451212402 its reverse (20421215452), we get a palindrome (45872427854).

The spelling of 25451212402 in words is "twenty-five billion, four hundred fifty-one million, two hundred twelve thousand, four hundred two".