36621187344 has 400 divisors, whose sum is σ = 125866515456. Its totient is φ = 10059033600.

The previous prime is 36621187319. The next prime is 36621187363. The reversal of 36621187344 is 44378112663.

36621187344 is a `hidden beast` number, since 3 + 6 + 621 + 18 + 7 + 3 + 4 + 4 = 666.

It is a super-2 number, since 2×36621187344² (a number of 22 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 36621187344.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 55402374 + ... + 55403034.

Almost surely, 2^36621187344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 36621187344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62933257728).

36621187344 is an abundant number, since it is smaller than the sum of its proper divisors (89245328112).

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

36621187344 is a wasteful number, since it uses less digits than its factorization.

36621187344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916 (or 901 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The spelling of 36621187344 in words is "thirty-six billion, six hundred twenty-one million, one hundred eighty-seven thousand, three hundred forty-four".