1399174637657 has 4 divisors (see below), whose sum is σ = 1472815408080. Its totient is φ = 1325533867236.

The previous prime is 1399174637647. The next prime is 1399174637659. The reversal of 1399174637657 is 7567364719931.

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 a de Polignac number, because none of the positive numbers 2^k-1399174637657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1399174637659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36820385183 + ... + 36820385220.

It is an arithmetic number, because the mean of its divisors is an integer number (368203852020).

Almost surely, 2^{1399174637657} is an apocalyptic number.

It is an amenable number.

1399174637657 is a deficient number, since it is larger than the sum of its proper divisors (73640770423).

1399174637657 is an equidigital number, since it uses as much as digits as its factorization.

1399174637657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73640770422.

The product of its digits is 180033840, while the sum is 68.

The spelling of 1399174637657 in words is "one trillion, three hundred ninety-nine billion, one hundred seventy-four million, six hundred thirty-seven thousand, six hundred fifty-seven".