12696700677049 has 9 divisors (see below), whose sum is σ = 12940973559759. Its totient is φ = 12456954998280.

The previous prime is 12696700676879. The next prime is 12696700677091. The reversal of 12696700677049 is 94077600769621.

The square root of 12696700677049 is 3563243.

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., 9153014906025 + 3543685771024 = 3025395^2 + 1882468^2 .

It is not a de Polignac number, because 12696700677049 - 2¹⁹ = 12696700152761 is a prime.

It is a super-2 number, since 2×12696700677049² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12696700672049) 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, 188818264 + ... + 188885494.

Almost surely, 2^{12696700677049} is an apocalyptic number.

12696700677049 is the 3563243-rd square number.

12696700677049 is the 1781622-nd centered octagonal number.

It is an amenable number.

12696700677049 is a deficient number, since it is larger than the sum of its proper divisors (244272882710).

12696700677049 is an frugal number, since it uses more digits than its factorization.

12696700677049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134568 (or 67284 counting only the distinct ones).

The product of its (nonzero) digits is 48009024, while the sum is 64.

Multiplying 12696700677049 by its sum of digits (64), we get a square (812588843331136 = 28505944²).

The spelling of 12696700677049 in words is "twelve trillion, six hundred ninety-six billion, seven hundred million, six hundred seventy-seven thousand, forty-nine".