30180183156 has 18 divisors (see below), whose sum is σ = 76288796402. Its totient is φ = 10060061040.

The previous prime is 30180183133. The next prime is 30180183157. The reversal of 30180183156 is 65138108103.

It can be written as a sum of positive squares in only one way, i.e., 22906822500 + 7273360656 = 151350^2 + 85284^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×30180183156² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 838338421 = 30180183156 / (3 + 0 + 1 + 8 + 0 + 1 + 8 + 3 + 1 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 30180183156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30180183157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 419169175 + ... + 419169246.

Almost surely, 2^30180183156 is an apocalyptic number.

30180183156 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

30180183156 is an abundant number, since it is smaller than the sum of its proper divisors (46108613246).

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

30180183156 is a wasteful number, since it uses less digits than its factorization.

30180183156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838338431 (or 838338426 counting only the distinct ones).

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

The spelling of 30180183156 in words is "thirty billion, one hundred eighty million, one hundred eighty-three thousand, one hundred fifty-six".