1397764396899 has 40 divisors (see below), whose sum is σ = 2248788537072. Its totient is φ = 860104059840.

The previous prime is 1397764396891. The next prime is 1397764396913. The reversal of 1397764396899 is 9986934677931.

1397764396899 is a `hidden beast` number, since 1 + 3 + 97 + 7 + 6 + 439 + 6 + 8 + 99 = 666.

It is not a de Polignac number, because 1397764396899 - 2³ = 1397764396891 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (1397764396891) 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 39 ways as a sum of consecutive naturals, for example, 19352844 + ... + 19424934.

Almost surely, 2^{1397764396899} is an apocalyptic number.

1397764396899 is a deficient number, since it is larger than the sum of its proper divisors (851024140173).

1397764396899 is a wasteful number, since it uses less digits than its factorization.

1397764396899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90529 (or 90520 counting only the distinct ones).

The product of its digits is 3333197952, while the sum is 81.

The spelling of 1397764396899 in words is "one trillion, three hundred ninety-seven billion, seven hundred sixty-four million, three hundred ninety-six thousand, eight hundred ninety-nine".