30491491563 has 54 divisors (see below), whose sum is σ = 48492289404. Its totient is φ = 18450143712.

The previous prime is 30491491561. The next prime is 30491491573. The reversal of 30491491563 is 36519419403.

30491491563 is a `hidden beast` number, since 3 + 0 + 49 + 1 + 49 + 1 + 563 = 666.

It is not a de Polignac number, because 30491491563 - 2¹ = 30491491561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30491491561) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 55742856 + ... + 55743402.

Almost surely, 2^30491491563 is an apocalyptic number.

30491491563 is a deficient number, since it is larger than the sum of its proper divisors (18000797841).

30491491563 is an equidigital number, since it uses as much as digits as its factorization.

30491491563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 30491491563 in words is "thirty billion, four hundred ninety-one million, four hundred ninety-one thousand, five hundred sixty-three".