399686399999901 has 48 divisors (see below), whose sum is σ = 682554476448000. Its totient is φ = 220515668884224.

The previous prime is 399686399999881. The next prime is 399686399999917. The reversal of 399686399999901 is 109999993686993.

399686399999901 is a `hidden beast` number, since 39 + 9 + 6 + 8 + 6 + 399 + 9 + 99 + 90 + 1 = 666.

It is not a de Polignac number, because 399686399999901 - 2⁹ = 399686399999389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 399686399999793 and 399686399999802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399686399999951) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 686293705 + ... + 686875841.

It is an arithmetic number, because the mean of its divisors is an integer number (14219884926000).

Almost surely, 2^{399686399999901} is an apocalyptic number.

It is an amenable number.

399686399999901 is a deficient number, since it is larger than the sum of its proper divisors (282868076448099).

399686399999901 is a wasteful number, since it uses less digits than its factorization.

399686399999901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957978 (or 957975 counting only the distinct ones).

The product of its (nonzero) digits is 111577100832, while the sum is 99.

The spelling of 399686399999901 in words is "three hundred ninety-nine trillion, six hundred eighty-six billion, three hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred one".