79780262116 has 27 divisors (see below), whose sum is σ = 147370213641. Its totient is φ = 37785566304.

The previous prime is 79780262101. The next prime is 79780262123. The reversal of 79780262116 is 61126208797.

The square root of 79780262116 is 282454.

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., 4756860900 + 75023401216 = 68970^2 + 273904^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79780262116.

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, 10729536 + ... + 10736968.

Almost surely, 2^79780262116 is an apocalyptic number.

79780262116 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

79780262116 is the 282454-th square number.

It is an amenable number.

79780262116 is a deficient number, since it is larger than the sum of its proper divisors (67589951525).

79780262116 is an frugal number, since it uses more digits than its factorization.

79780262116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14908 (or 7454 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

Multiplying 79780262116 by its sum of digits (49), we get a square (3909232843684 = 1977178²).

The spelling of 79780262116 in words is "seventy-nine billion, seven hundred eighty million, two hundred sixty-two thousand, one hundred sixteen".