12767901697 has 4 divisors (see below), whose sum is σ = 13518954756. Its totient is φ = 12016848640.

The previous prime is 12767901691. The next prime is 12767901709. The reversal of 12767901697 is 79610976721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79610976721 = 15217 ⋅5231713.

It can be written as a sum of positive squares in 2 ways, for example, as 7180189696 + 5587712001 = 84736^2 + 74751^2 .

It is a cyclic number.

It is not a de Polignac number, because 12767901697 - 2¹¹ = 12767899649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12767901691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375526504 + ... + 375526537.

It is an arithmetic number, because the mean of its divisors is an integer number (3379738689).

Almost surely, 2^12767901697 is an apocalyptic number.

12767901697 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12767901697 is a deficient number, since it is larger than the sum of its proper divisors (751053059).

12767901697 is an equidigital number, since it uses as much as digits as its factorization.

12767901697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751053058.

The product of its (nonzero) digits is 2000376, while the sum is 55.

The spelling of 12767901697 in words is "twelve billion, seven hundred sixty-seven million, nine hundred one thousand, six hundred ninety-seven".