399766377023 has 16 divisors (see below), whose sum is σ = 433892075232. Its totient is φ = 366123888000.

The previous prime is 399766377001. The next prime is 399766377079. The reversal of 399766377023 is 320773667993.

It is not a de Polignac number, because 399766377023 - 2⁸ = 399766376767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399766377083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9483413 + ... + 9525473.

It is an arithmetic number, because the mean of its divisors is an integer number (27118254702).

Almost surely, 2^399766377023 is an apocalyptic number.

399766377023 is a deficient number, since it is larger than the sum of its proper divisors (34125698209).

399766377023 is a wasteful number, since it uses less digits than its factorization.

399766377023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47786.

The product of its (nonzero) digits is 54010152, while the sum is 62.

The spelling of 399766377023 in words is "three hundred ninety-nine billion, seven hundred sixty-six million, three hundred seventy-seven thousand, twenty-three".