399725777995 has 16 divisors (see below), whose sum is σ = 483217241760. Its totient is φ = 317422837504.

The previous prime is 399725777981. The next prime is 399725778043. The reversal of 399725777995 is 599777527993.

It is a cyclic number.

It is not a de Polignac number, because 399725777995 - 2²⁵ = 399692223563 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 97599 + ... + 899431.

It is an arithmetic number, because the mean of its divisors is an integer number (30201077610).

Almost surely, 2^399725777995 is an apocalyptic number.

399725777995 is a deficient number, since it is larger than the sum of its proper divisors (83491463765).

399725777995 is a wasteful number, since it uses less digits than its factorization.

399725777995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802574.

The product of its digits is 2362944150, while the sum is 79.

The spelling of 399725777995 in words is "three hundred ninety-nine billion, seven hundred twenty-five million, seven hundred seventy-seven thousand, nine hundred ninety-five".