30681579492 has 36 divisors (see below), whose sum is σ = 80428669776. Its totient is φ = 10227192840.

The previous prime is 30681579473. The next prime is 30681579499. The reversal of 30681579492 is 29497518603.

30681579492 is a `hidden beast` number, since 3 + 0 + 6 + 81 + 5 + 79 + 492 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (30681579499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15781734 + ... + 15783677.

It is an arithmetic number, because the mean of its divisors is an integer number (2234129716).

It is a 1-persistent number, because it is pandigital, but 2⋅30681579492 = 61363158984 is not.

Almost surely, 2^30681579492 is an apocalyptic number.

It is an amenable number.

30681579492 is an abundant number, since it is smaller than the sum of its proper divisors (49747090284).

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

30681579492 is a wasteful number, since it uses less digits than its factorization.

30681579492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31565430 (or 31565416 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 30681579492 in words is "thirty billion, six hundred eighty-one million, five hundred seventy-nine thousand, four hundred ninety-two".