1279939246336 has 27 divisors (see below), whose sum is σ = 2554914862801. Its totient is φ = 639960572416.

The previous prime is 1279939246151. The next prime is 1279939246361. The reversal of 1279939246336 is 6336429399721.

The square root of 1279939246336 is 1131344.

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., 1245134612736 + 34804633600 = 1115856^2 + 186560^2 .

It is a super-2 number, since 2×1279939246336² (a number of 25 digits) contains 22 as substring.

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 2 ways as a sum of consecutive naturals, for example, 18066150 + ... + 18136858.

Almost surely, 2^{1279939246336} is an apocalyptic number.

1279939246336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1279939246336 is the 1131344-th square number.

It is an amenable number.

1279939246336 is a deficient number, since it is larger than the sum of its proper divisors (1274975616465).

1279939246336 is an frugal number, since it uses more digits than its factorization.

1279939246336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141434 (or 70711 counting only the distinct ones).

The product of its digits is 79361856, while the sum is 64.

Multiplying 1279939246336 by its sum of digits (64), we get a square (81916111765504 = 9050752²).

1279939246336 divided by its sum of digits (64) gives a square (19999050724 = 141418²).

The spelling of 1279939246336 in words is "one trillion, two hundred seventy-nine billion, nine hundred thirty-nine million, two hundred forty-six thousand, three hundred thirty-six".