399260009615 has 16 divisors (see below), whose sum is σ = 490852728576. Its totient is φ = 311582611200.

The previous prime is 399260009591. The next prime is 399260009717. The reversal of 399260009615 is 516900062993.

It is not a de Polignac number, because 399260009615 - 2²⁸ = 398991574159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1804169 + ... + 2013341.

It is an arithmetic number, because the mean of its divisors is an integer number (30678295536).

Almost surely, 2^399260009615 is an apocalyptic number.

399260009615 is a deficient number, since it is larger than the sum of its proper divisors (91592718961).

399260009615 is a wasteful number, since it uses less digits than its factorization.

399260009615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218530.

The product of its (nonzero) digits is 787320, while the sum is 50.

The spelling of 399260009615 in words is "three hundred ninety-nine billion, two hundred sixty million, nine thousand, six hundred fifteen".