399459640135 has 8 divisors (see below), whose sum is σ = 479960660016. Its totient is φ = 319161650880.

The previous prime is 399459640117. The next prime is 399459640163. The reversal of 399459640135 is 531046954993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 399459640135 - 2²⁷ = 399325422407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 399459640135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50753326 + ... + 50761195.

It is an arithmetic number, because the mean of its divisors is an integer number (59995082502).

Almost surely, 2^399459640135 is an apocalyptic number.

399459640135 is a deficient number, since it is larger than the sum of its proper divisors (80501019881).

399459640135 is a wasteful number, since it uses less digits than its factorization.

399459640135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101515313.

The product of its (nonzero) digits is 15746400, while the sum is 58.

The spelling of 399459640135 in words is "three hundred ninety-nine billion, four hundred fifty-nine million, six hundred forty thousand, one hundred thirty-five".