30497807520 has 72 divisors (see below), whose sum is σ = 104073773076. Its totient is φ = 8132748288.

The previous prime is 30497807449. The next prime is 30497807537. The reversal of 30497807520 is 2570879403.

30497807520 is a `hidden beast` number, since 3 + 0 + 49 + 7 + 80 + 7 + 520 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 29582624016 + 915183504 = 171996^2 + 30252^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10588077 + ... + 10590956.

Almost surely, 2^30497807520 is an apocalyptic number.

30497807520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30497807520 is an abundant number, since it is smaller than the sum of its proper divisors (73575965556).

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

30497807520 is a wasteful number, since it uses less digits than its factorization.

30497807520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21179054 (or 21179043 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 30497807520 in words is "thirty billion, four hundred ninety-seven million, eight hundred seven thousand, five hundred twenty".