25624612042 has 4 divisors (see below), whose sum is σ = 38436918066. Its totient is φ = 12812306020.

The previous prime is 25624612037. The next prime is 25624612103. The reversal of 25624612042 is 24021642652.

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., 25555539321 + 69072721 = 159861^2 + 8311^2 .

It is a super-2 number, since 2×25624612042² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25624611989 and 25624612007.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6406153009 + ... + 6406153012.

Almost surely, 2^25624612042 is an apocalyptic number.

25624612042 is a deficient number, since it is larger than the sum of its proper divisors (12812306024).

25624612042 is a wasteful number, since it uses less digits than its factorization.

25624612042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12812306023.

The product of its (nonzero) digits is 46080, while the sum is 34.

The spelling of 25624612042 in words is "twenty-five billion, six hundred twenty-four million, six hundred twelve thousand, forty-two".