30406520644 has 12 divisors (see below), whose sum is σ = 53277191100. Its totient is φ = 15184466048.

The previous prime is 30406520579. The next prime is 30406520647. The reversal of 30406520644 is 44602560403.

It can be written as a sum of positive squares in 2 ways, for example, as 12119367744 + 18287152900 = 110088^2 + 135230^2 .

It is not an unprimeable number, because it can be changed into a prime (30406520647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4694929 + ... + 4701400.

It is an arithmetic number, because the mean of its divisors is an integer number (4439765925).

Almost surely, 2^30406520644 is an apocalyptic number.

It is an amenable number.

30406520644 is a deficient number, since it is larger than the sum of its proper divisors (22870670456).

30406520644 is a wasteful number, since it uses less digits than its factorization.

30406520644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9397142 (or 9397140 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

The spelling of 30406520644 in words is "thirty billion, four hundred six million, five hundred twenty thousand, six hundred forty-four".