25000000002 has 16 divisors (see below), whose sum is σ = 55555555680. Its totient is φ = 8333333316.

The previous prime is 24999999991. The next prime is 25000000013. The reversal of 25000000002 is 20000000052.

It is an interprime number because it is at equal distance from previous prime (24999999991) and next prime (25000000013).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231481428 + ... + 231481535.

It is an arithmetic number, because the mean of its divisors is an integer number (3472222230).

Almost surely, 2^25000000002 is an apocalyptic number.

25000000002 is an abundant number, since it is smaller than the sum of its proper divisors (30555555678).

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

25000000002 is a wasteful number, since it uses less digits than its factorization.

25000000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462962974 (or 462962968 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 9.

Adding to 25000000002 its reverse (20000000052), we get a palindrome (45000000054).

The spelling of 25000000002 in words is "twenty-five billion, two", and thus it is an aban number and an uban number.