36971599921 has 8 divisors (see below), whose sum is σ = 37679855400. Its totient is φ = 36263740032.

The previous prime is 36971599909. The next prime is 36971599927. The reversal of 36971599921 is 12999517963.

36971599921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 64963600 + 36906636321 = 8060^2 + 192111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36971599921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 36971599921.

It is not an unprimeable number, because it can be changed into a prime (36971599927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93355 + ... + 287503.

It is an arithmetic number, because the mean of its divisors is an integer number (4709981925).

Almost surely, 2^36971599921 is an apocalyptic number.

It is an amenable number.

36971599921 is a deficient number, since it is larger than the sum of its proper divisors (708255479).

36971599921 is a wasteful number, since it uses less digits than its factorization.

36971599921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197795.

The product of its digits is 8266860, while the sum is 61.

The spelling of 36971599921 in words is "thirty-six billion, nine hundred seventy-one million, five hundred ninety-nine thousand, nine hundred twenty-one".