30081815136 has 72 divisors (see below), whose sum is σ = 85928955840. Its totient is φ = 9982285056.

The previous prime is 30081815117. The next prime is 30081815143. The reversal of 30081815136 is 63151818003.

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 (36).

It is a self number, because there is not a number n which added to its sum of digits gives 30081815136.

It is a congruent number.

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, 169971 + ... + 298418.

It is an arithmetic number, because the mean of its divisors is an integer number (1193457720).

Almost surely, 2^30081815136 is an apocalyptic number.

30081815136 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

30081815136 is an abundant number, since it is smaller than the sum of its proper divisors (55847140704).

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

30081815136 is a wasteful number, since it uses less digits than its factorization.

30081815136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468628 (or 468617 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 30081815136 in words is "thirty billion, eighty-one million, eight hundred fifteen thousand, one hundred thirty-six".