72174772379 has 4 divisors (see below), whose sum is σ = 72175406160. Its totient is φ = 72174138600.

The previous prime is 72174772367. The next prime is 72174772421. The reversal of 72174772379 is 97327747127.

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 a cyclic number.

It is not a de Polignac number, because 72174772379 - 2¹² = 72174768283 is a prime.

It is a super-2 number, since 2×72174772379² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72174772309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93647 + ... + 391304.

It is an arithmetic number, because the mean of its divisors is an integer number (18043851540).

Almost surely, 2^72174772379 is an apocalyptic number.

72174772379 is a deficient number, since it is larger than the sum of its proper divisors (633781).

72174772379 is a wasteful number, since it uses less digits than its factorization.

72174772379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633780.

The product of its digits is 7260624, while the sum is 56.

The spelling of 72174772379 in words is "seventy-two billion, one hundred seventy-four million, seven hundred seventy-two thousand, three hundred seventy-nine".