79855977744 has 45 divisors (see below), whose sum is σ = 223495317253. Its totient is φ = 26617528896.

The previous prime is 79855977709. The next prime is 79855977749. The reversal of 79855977744 is 44777955897.

The square root of 79855977744 is 282588.

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

It can be written as a sum of positive squares in only one way, i.e., 61027344 + 79794950400 = 7812^2 + 282480^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79855977749) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3379282 + ... + 3402830.

Almost surely, 2^79855977744 is an apocalyptic number.

79855977744 is the 282588-th square number.

It is an amenable number.

79855977744 is an abundant number, since it is smaller than the sum of its proper divisors (143639339509).

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

79855977744 is an frugal number, since it uses more digits than its factorization.

79855977744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47112 (or 23554 counting only the distinct ones).

The product of its digits is 622339200, while the sum is 72.

The spelling of 79855977744 in words is "seventy-nine billion, eight hundred fifty-five million, nine hundred seventy-seven thousand, seven hundred forty-four".