79573639744 has 63 divisors (see below), whose sum is σ = 162457427307. Its totient is φ = 38670879744.

The previous prime is 79573639601. The next prime is 79573639801. The reversal of 79573639744 is 44793637597.

The square root of 79573639744 is 282088.

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

It can be written as a sum of positive squares in 4 ways, for example, as 10467745344 + 69105894400 = 102312^2 + 262880^2 .

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 83497572 + ... + 83498524.

Almost surely, 2^79573639744 is an apocalyptic number.

79573639744 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

79573639744 is the 282088-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79573639744

79573639744 is an abundant number, since it is smaller than the sum of its proper divisors (82883787563).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79573639744 is an frugal number, since it uses more digits than its factorization.

79573639744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992 (or 992 counting only the distinct ones).

The product of its digits is 120022560, while the sum is 64.

Multiplying 79573639744 by its sum of digits (64), we get a square (5092712943616 = 2256704²).

79573639744 divided by its sum of digits (64) gives a square (1243338121 = 35261²).

The spelling of 79573639744 in words is "seventy-nine billion, five hundred seventy-three million, six hundred thirty-nine thousand, seven hundred forty-four".