36672720161731 has 4 divisors (see below), whose sum is σ = 38829938994792. Its totient is φ = 34515501328672.

The previous prime is 36672720161719. The next prime is 36672720161849. The reversal of 36672720161731 is 13716102727663.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 36672720161731 - 2¹³ = 36672720153539 is a prime.

It is a super-2 number, since 2×36672720161731² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36672720161131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1078609416505 + ... + 1078609416538.

It is an arithmetic number, because the mean of its divisors is an integer number (9707484748698).

Almost surely, 2^{36672720161731} is an apocalyptic number.

36672720161731 is a deficient number, since it is larger than the sum of its proper divisors (2157218833061).

36672720161731 is a wasteful number, since it uses less digits than its factorization.

36672720161731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157218833060.

The product of its (nonzero) digits is 2667168, while the sum is 52.

The spelling of 36672720161731 in words is "thirty-six trillion, six hundred seventy-two billion, seven hundred twenty million, one hundred sixty-one thousand, seven hundred thirty-one".