30657400640 has 112 divisors (see below), whose sum is σ = 75822048000. Its totient is φ = 11798280192.

The previous prime is 30657400637. The next prime is 30657400667. The reversal of 30657400640 is 4600475603.

It is a self number, because there is not a number n which added to its sum of digits gives 30657400640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 870086 + ... + 904634.

Almost surely, 2^30657400640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30657400640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37911024000).

30657400640 is an abundant number, since it is smaller than the sum of its proper divisors (45164647360).

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

30657400640 is a wasteful number, since it uses less digits than its factorization.

30657400640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34672 (or 34662 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The spelling of 30657400640 in words is "thirty billion, six hundred fifty-seven million, four hundred thousand, six hundred forty".