30640056421 has 12 divisors (see below), whose sum is σ = 34075003332. Its totient is φ = 27518714496.

The previous prime is 30640056413. The next prime is 30640056443. The reversal of 30640056421 is 12465004603.

It can be written as a sum of positive squares in 6 ways, for example, as 39551521 + 30600504900 = 6289^2 + 174930^2 .

It is not a de Polignac number, because 30640056421 - 2³ = 30640056413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30640056451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2443776 + ... + 2456281.

It is an arithmetic number, because the mean of its divisors is an integer number (2839583611).

Almost surely, 2^30640056421 is an apocalyptic number.

It is an amenable number.

30640056421 is a deficient number, since it is larger than the sum of its proper divisors (3434946911).

30640056421 is a wasteful number, since it uses less digits than its factorization.

30640056421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4900120 (or 4900107 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 30640056421 in words is "thirty billion, six hundred forty million, fifty-six thousand, four hundred twenty-one".