399788651367 has 48 divisors (see below), whose sum is σ = 665614310400. Its totient is φ = 226502692416.

The previous prime is 399788651333. The next prime is 399788651453. The reversal of 399788651367 is 763156887993.

399788651367 is a `hidden beast` number, since 39 + 9 + 78 + 8 + 6 + 513 + 6 + 7 = 666.

It is not a de Polignac number, because 399788651367 - 2²² = 399784457063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 399788651295 and 399788651304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399788651167) 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, 4535884 + ... + 4623182.

It is an arithmetic number, because the mean of its divisors is an integer number (13866964800).

Almost surely, 2^399788651367 is an apocalyptic number.

399788651367 is a deficient number, since it is larger than the sum of its proper divisors (265825659033).

399788651367 is a wasteful number, since it uses less digits than its factorization.

399788651367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87932 (or 87929 counting only the distinct ones).

The product of its digits is 411505920, while the sum is 72.

The spelling of 399788651367 in words is "three hundred ninety-nine billion, seven hundred eighty-eight million, six hundred fifty-one thousand, three hundred sixty-seven".