245126811657 has 96 divisors (see below), whose sum is σ = 417427032960. Its totient is φ = 126787368960.

The previous prime is 245126811613. The next prime is 245126811659. The reversal of 245126811657 is 756118621542.

It is a happy number.

It is not a de Polignac number, because 245126811657 - 2⁷ = 245126811529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245126811659) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 48817807 + ... + 48822827.

It is an arithmetic number, because the mean of its divisors is an integer number (4348198260).

Almost surely, 2^245126811657 is an apocalyptic number.

It is an amenable number.

245126811657 is a deficient number, since it is larger than the sum of its proper divisors (172300221303).

245126811657 is a wasteful number, since it uses less digits than its factorization.

245126811657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5543 (or 5536 counting only the distinct ones).

The product of its digits is 806400, while the sum is 48.

The spelling of 245126811657 in words is "two hundred forty-five billion, one hundred twenty-six million, eight hundred eleven thousand, six hundred fifty-seven".