12399761401 has 4 divisors (see below), whose sum is σ = 12420189952. Its totient is φ = 12379332852.

The previous prime is 12399761383. The next prime is 12399761453. The reversal of 12399761401 is 10416799321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12399761401 - 2⁵ = 12399761369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12399461401) 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, 10213365 + ... + 10214578.

It is an arithmetic number, because the mean of its divisors is an integer number (3105047488).

Almost surely, 2^12399761401 is an apocalyptic number.

It is an amenable number.

12399761401 is a deficient number, since it is larger than the sum of its proper divisors (20428551).

12399761401 is an equidigital number, since it uses as much as digits as its factorization.

12399761401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20428550.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 12399761401 in words is "twelve billion, three hundred ninety-nine million, seven hundred sixty-one thousand, four hundred one".