30151815156 has 72 divisors (see below), whose sum is σ = 79184294280. Its totient is φ = 9662306304.

The previous prime is 30151815131. The next prime is 30151815173. The reversal of 30151815156 is 65151815103.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10143712656 + 20008102500 = 100716^2 + 141450^2 .

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 30151815156.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 181276 + ... + 305228.

It is an arithmetic number, because the mean of its divisors is an integer number (1099781865).

Almost surely, 2^30151815156 is an apocalyptic number.

30151815156 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30151815156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39592147140).

30151815156 is an abundant number, since it is smaller than the sum of its proper divisors (49032479124).

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

30151815156 is a wasteful number, since it uses less digits than its factorization.

30151815156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124225 (or 124220 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 36.

The spelling of 30151815156 in words is "thirty billion, one hundred fifty-one million, eight hundred fifteen thousand, one hundred fifty-six".