12397798077 has 32 divisors (see below), whose sum is σ = 19756756992. Its totient is φ = 6761487744.

The previous prime is 12397798069. The next prime is 12397798081. The reversal of 12397798077 is 77089779321.

It is not a de Polignac number, because 12397798077 - 2³ = 12397798069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12397798077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12397798027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192648 + ... + 248814.

It is an arithmetic number, because the mean of its divisors is an integer number (617398656).

Almost surely, 2^12397798077 is an apocalyptic number.

It is an amenable number.

12397798077 is a deficient number, since it is larger than the sum of its proper divisors (7358958915).

12397798077 is a wasteful number, since it uses less digits than its factorization.

12397798077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56657.

The product of its (nonzero) digits is 9335088, while the sum is 60.

The spelling of 12397798077 in words is "twelve billion, three hundred ninety-seven million, seven hundred ninety-eight thousand, seventy-seven".