30644315440 has 20 divisors (see below), whose sum is σ = 71248033584. Its totient is φ = 12257726144.

The previous prime is 30644315333. The next prime is 30644315453. The reversal of 30644315440 is 4451344603.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 30644315396 and 30644315405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191526892 + ... + 191527051.

Almost surely, 2^30644315440 is an apocalyptic number.

It is an amenable number.

30644315440 is an abundant number, since it is smaller than the sum of its proper divisors (40603718144).

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

30644315440 is a wasteful number, since it uses less digits than its factorization.

30644315440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383053956 (or 383053950 counting only the distinct ones).

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

The spelling of 30644315440 in words is "thirty billion, six hundred forty-four million, three hundred fifteen thousand, four hundred forty".