36172739872 has 12 divisors (see below), whose sum is σ = 71215081686. Its totient is φ = 18086369920.

The previous prime is 36172739819. The next prime is 36172739873. The reversal of 36172739872 is 27893727163.

It can be written as a sum of positive squares in only one way, i.e., 35764861456 + 407878416 = 189116^2 + 20196^2 .

It is not an unprimeable number, because it can be changed into a prime (36172739873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565199029 + ... + 565199092.

Almost surely, 2^36172739872 is an apocalyptic number.

36172739872 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

36172739872 is a deficient number, since it is larger than the sum of its proper divisors (35042341814).

36172739872 is a wasteful number, since it uses less digits than its factorization.

36172739872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130398131 (or 1130398123 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 55.

The spelling of 36172739872 in words is "thirty-six billion, one hundred seventy-two million, seven hundred thirty-nine thousand, eight hundred seventy-two".