72317571849 has 10 divisors (see below), whose sum is σ = 108029953130. Its totient is φ = 48211714512.

The previous prime is 72317571803. The next prime is 72317571857. The reversal of 72317571849 is 94817571327.

72317571849 is a `hidden beast` number, since 7 + 23 + 1 + 7 + 571 + 8 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 58712682249 + 13604889600 = 242307^2 + 116640^2 .

It is not a de Polignac number, because 72317571849 - 2¹³ = 72317563657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72317571795 and 72317571804.

It is not an unprimeable number, because it can be changed into a prime (72317571899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 446404684 + ... + 446404845.

It is an arithmetic number, because the mean of its divisors is an integer number (10802995313).

Almost surely, 2^72317571849 is an apocalyptic number.

It is an amenable number.

72317571849 is a deficient number, since it is larger than the sum of its proper divisors (35712381281).

72317571849 is an equidigital number, since it uses as much as digits as its factorization.

72317571849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892809541 (or 892809532 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The spelling of 72317571849 in words is "seventy-two billion, three hundred seventeen million, five hundred seventy-one thousand, eight hundred forty-nine".