25000252642 has 4 divisors (see below), whose sum is σ = 37500378966. Its totient is φ = 12500126320.

The previous prime is 25000252639. The next prime is 25000252679. The reversal of 25000252642 is 24625200052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15722902881 + 9277349761 = 125391^2 + 96319^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25000252642.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6250063159 + ... + 6250063162.

Almost surely, 2^25000252642 is an apocalyptic number.

25000252642 is a deficient number, since it is larger than the sum of its proper divisors (12500126324).

25000252642 is a wasteful number, since it uses less digits than its factorization.

25000252642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12500126323.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 25000252642 its reverse (24625200052), we get a palindrome (49625452694).

The spelling of 25000252642 in words is "twenty-five billion, two hundred fifty-two thousand, six hundred forty-two".