399573375993 has 24 divisors (see below), whose sum is σ = 639952599936. Its totient is φ = 238195749600.

The previous prime is 399573375983. The next prime is 399573376049.

399573375993 is a `hidden beast` number, since 399 + 5 + 73 + 37 + 59 + 93 = 666.

399573375993 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 399573375993 - 2¹⁴ = 399573359609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399573375983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33076705 + ... + 33088782.

It is an arithmetic number, because the mean of its divisors is an integer number (26664691664).

Almost surely, 2^399573375993 is an apocalyptic number.

399573375993 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

399573375993 is a deficient number, since it is larger than the sum of its proper divisors (240379223943).

399573375993 is a wasteful number, since it uses less digits than its factorization.

399573375993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66165565 (or 66165562 counting only the distinct ones).

The product of its digits is 651015225, while the sum is 72.

The spelling of 399573375993 in words is "three hundred ninety-nine billion, five hundred seventy-three million, three hundred seventy-five thousand, nine hundred ninety-three".