36399399984 has 120 divisors (see below), whose sum is σ = 106975376352. Its totient is φ = 11531520000.

The previous prime is 36399399973. The next prime is 36399399989. The reversal of 36399399984 is 48999399363.

36399399984 is a `hidden beast` number, since 3 + 63 + 99 + 399 + 98 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

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

It is not an unprimeable number, because it can be changed into a prime (36399399989) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 484984 + ... + 554984.

Almost surely, 2^36399399984 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 36399399984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53487688176).

36399399984 is an abundant number, since it is smaller than the sum of its proper divisors (70575976368).

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

36399399984 is a wasteful number, since it uses less digits than its factorization.

36399399984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70195 (or 70186 counting only the distinct ones).

The product of its digits is 306110016, while the sum is 72.

The spelling of 36399399984 in words is "thirty-six billion, three hundred ninety-nine million, three hundred ninety-nine thousand, nine hundred eighty-four".