18156762552 has 192 divisors, whose sum is σ = 49601376000. Its totient is φ = 5535535104.

The previous prime is 18156762529. The next prime is 18156762563. The reversal of 18156762552 is 25526765181.

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 47 ways as a sum of consecutive naturals, for example, 41359149 + ... + 41359587.

It is an arithmetic number, because the mean of its divisors is an integer number (258340500).

Almost surely, 2^18156762552 is an apocalyptic number.

18156762552 is a gapful number since it is divisible by the number (12) 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 18156762552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24800688000).

18156762552 is an abundant number, since it is smaller than the sum of its proper divisors (31444613448).

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

18156762552 is a wasteful number, since it uses less digits than its factorization.

18156762552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 617 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 48.

The spelling of 18156762552 in words is "eighteen billion, one hundred fifty-six million, seven hundred sixty-two thousand, five hundred fifty-two".