30531402561 has 48 divisors (see below), whose sum is σ = 45214271424. Its totient is φ = 18311040000.

The previous prime is 30531402553. The next prime is 30531402593. The reversal of 30531402561 is 16520413503.

It is not a de Polignac number, because 30531402561 - 2³ = 30531402553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30531442561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19941366 + ... + 19942896.

It is an arithmetic number, because the mean of its divisors is an integer number (941963988).

Almost surely, 2^30531402561 is an apocalyptic number.

It is an amenable number.

30531402561 is a deficient number, since it is larger than the sum of its proper divisors (14682868863).

30531402561 is a wasteful number, since it uses less digits than its factorization.

30531402561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094 (or 2083 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 30531402561 in words is "thirty billion, five hundred thirty-one million, four hundred two thousand, five hundred sixty-one".