12401605657 has 24 divisors (see below), whose sum is σ = 14643006336. Its totient is φ = 10470696768.

The previous prime is 12401605649. The next prime is 12401605663. The reversal of 12401605657 is 75650610421.

It is a happy number.

12401605657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12401605657 - 2³ = 12401605649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12401605687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3514428 + ... + 3517954.

It is an arithmetic number, because the mean of its divisors is an integer number (610125264).

Almost surely, 2^12401605657 is an apocalyptic number.

It is an amenable number.

12401605657 is a deficient number, since it is larger than the sum of its proper divisors (2241400679).

12401605657 is an equidigital number, since it uses as much as digits as its factorization.

12401605657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4597 (or 4590 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 12401605657 in words is "twelve billion, four hundred one million, six hundred five thousand, six hundred fifty-seven".