30872556961 has 4 divisors (see below), whose sum is σ = 32497428400. Its totient is φ = 29247685524.

The previous prime is 30872556917. The next prime is 30872556977. The reversal of 30872556961 is 16965527803.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30872556961 - 2⁷ = 30872556833 is a prime.

It is a super-2 number, since 2×30872556961² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30872556899 and 30872556908.

It is not an unprimeable number, because it can be changed into a prime (30872556901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812435691 + ... + 812435728.

It is an arithmetic number, because the mean of its divisors is an integer number (8124357100).

Almost surely, 2^30872556961 is an apocalyptic number.

It is an amenable number.

30872556961 is a deficient number, since it is larger than the sum of its proper divisors (1624871439).

30872556961 is a wasteful number, since it uses less digits than its factorization.

30872556961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624871438.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 30872556961 in words is "thirty billion, eight hundred seventy-two million, five hundred fifty-six thousand, nine hundred sixty-one".