399960069993 has 48 divisors (see below), whose sum is σ = 640294042752. Its totient is φ = 238561920000.

The previous prime is 399960069991. The next prime is 399960070001.

399960069993 is a `hidden beast` number, since 3 + 9 + 9 + 9 + 600 + 6 + 9 + 9 + 9 + 3 = 666.

399960069993 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 399960069993 - 2¹ = 399960069991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399960069991) 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, 1550073 + ... + 1789593.

It is an arithmetic number, because the mean of its divisors is an integer number (13339459224).

Almost surely, 2^399960069993 is an apocalyptic number.

399960069993 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

399960069993 is a deficient number, since it is larger than the sum of its proper divisors (240333972759).

399960069993 is a wasteful number, since it uses less digits than its factorization.

399960069993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239806 (or 239803 counting only the distinct ones).

The product of its (nonzero) digits is 172186884, while the sum is 72.

The spelling of 399960069993 in words is "three hundred ninety-nine billion, nine hundred sixty million, sixty-nine thousand, nine hundred ninety-three".