36439373881 has 3 divisors (see below), whose sum is σ = 36439564773. Its totient is φ = 36439182990.

The previous prime is 36439373819. The next prime is 36439373941. The reversal of 36439373881 is 18837393463.

The square root of 36439373881 is 190891.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 36439373881 - 2⁷ = 36439373753 is a prime.

It is a super-2 number, since 2×36439373881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36439370881) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 95446 + ... + 286336.

It is an arithmetic number, because the mean of its divisors is an integer number (12146521591).

Almost surely, 2^36439373881 is an apocalyptic number.

36439373881 is the 190891-st square number.

36439373881 is the 95446-th centered octagonal number.

It is an amenable number.

36439373881 is a deficient number, since it is larger than the sum of its proper divisors (190892).

36439373881 is an frugal number, since it uses more digits than its factorization.

36439373881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381782 (or 190891 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 55.

The spelling of 36439373881 in words is "thirty-six billion, four hundred thirty-nine million, three hundred seventy-three thousand, eight hundred eighty-one".