1625612004 has 30 divisors (see below), whose sum is σ = 4249671734. Its totient is φ = 541870560.

The previous prime is 1625612003. The next prime is 1625612059. The reversal of 1625612004 is 4002165261.

1625612004 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1341756900 + 283855104 = 36630^2 + 16848^2 .

It is a super-2 number, since 2×1625612004² = 5285228775097792032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1625612003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2508337 + ... + 2508984.

Almost surely, 2^1625612004 is an apocalyptic number.

It is an amenable number.

1625612004 is an abundant number, since it is smaller than the sum of its proper divisors (2624059730).

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

1625612004 is a wasteful number, since it uses less digits than its factorization.

1625612004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5017337 (or 5017326 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1625612004 is about 40318.8790022739. The cubic root of 1625612004 is about 1175.8149177699.

Adding to 1625612004 its reverse (4002165261), we get a palindrome (5627777265).

The spelling of 1625612004 in words is "one billion, six hundred twenty-five million, six hundred twelve thousand, four".