30640125637 has 4 divisors (see below), whose sum is σ = 33425591616. Its totient is φ = 27854659660.

The previous prime is 30640125631. The next prime is 30640125641. The reversal of 30640125637 is 73652104603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30640125637 is a prime.

It is a super-2 number, since 2×30640125637² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30640125596 and 30640125605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30640125631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1392732973 + ... + 1392732994.

It is an arithmetic number, because the mean of its divisors is an integer number (8356397904).

Almost surely, 2^30640125637 is an apocalyptic number.

It is an amenable number.

30640125637 is a deficient number, since it is larger than the sum of its proper divisors (2785465979).

30640125637 is a wasteful number, since it uses less digits than its factorization.

30640125637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785465978.

The product of its (nonzero) digits is 90720, while the sum is 37.

The spelling of 30640125637 in words is "thirty billion, six hundred forty million, one hundred twenty-five thousand, six hundred thirty-seven".