30640721130 has 96 divisors (see below), whose sum is σ = 81757076544. Its totient is φ = 7957490688.

The previous prime is 30640721119. The next prime is 30640721147. The reversal of 30640721130 is 3112704603.

30640721130 is a `hidden beast` number, since 3 + 0 + 640 + 7 + 2 + 1 + 13 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 30640721094 and 30640721103.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1331482 + ... + 1354298.

It is an arithmetic number, because the mean of its divisors is an integer number (851636214).

Almost surely, 2^30640721130 is an apocalyptic number.

30640721130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30640721130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40878538272).

30640721130 is an abundant number, since it is smaller than the sum of its proper divisors (51116355414).

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

30640721130 is a wasteful number, since it uses less digits than its factorization.

30640721130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23220 (or 23217 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The spelling of 30640721130 in words is "thirty billion, six hundred forty million, seven hundred twenty-one thousand, one hundred thirty".