36313494721 has 15 divisors (see below), whose sum is σ = 42374119011. Its totient is φ = 31117849056.

The previous prime is 36313494689. The next prime is 36313494733. The reversal of 36313494721 is 12749431363.

The square root of 36313494721 is 190561.

It is a perfect power (a square), and thus also a powerful number.

36313494721 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 only one way, i.e., 26321493121 + 9992001600 = 162239^2 + 99960^2 .

It is not a de Polignac number, because 36313494721 - 2⁵ = 36313494689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (36313494751) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 9335545 + ... + 9339433.

Almost surely, 2^36313494721 is an apocalyptic number.

36313494721 is the 190561-st square number.

36313494721 is the 95281-st centered octagonal number.

It is an amenable number.

36313494721 is a deficient number, since it is larger than the sum of its proper divisors (6060624290).

36313494721 is an frugal number, since it uses more digits than its factorization.

36313494721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7806 (or 3896 counting only the distinct ones).

The product of its digits is 326592, while the sum is 43.

The spelling of 36313494721 in words is "thirty-six billion, three hundred thirteen million, four hundred ninety-four thousand, seven hundred twenty-one".