399874439946519 has 12 divisors (see below), whose sum is σ = 611572672859616. Its totient is φ = 250901609378112.

The previous prime is 399874439946481. The next prime is 399874439946547. The reversal of 399874439946519 is 915649934478993.

399874439946519 is a `hidden beast` number, since 3 + 9 + 9 + 8 + 7 + 4 + 43 + 9 + 9 + 46 + 519 = 666.

It is not a de Polignac number, because 399874439946519 - 2¹⁶ = 399874439880983 is a prime.

It is a super-2 number, since 2×399874439946519² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399874439942519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1306779215359 + ... + 1306779215664.

It is an arithmetic number, because the mean of its divisors is an integer number (50964389404968).

Almost surely, 2^{399874439946519} is an apocalyptic number.

399874439946519 is a deficient number, since it is larger than the sum of its proper divisors (211698232913097).

399874439946519 is a wasteful number, since it uses less digits than its factorization.

399874439946519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2613558431046 (or 2613558431043 counting only the distinct ones).

The product of its digits is 57140536320, while the sum is 90.

The spelling of 399874439946519 in words is "three hundred ninety-nine trillion, eight hundred seventy-four billion, four hundred thirty-nine million, nine hundred forty-six thousand, five hundred nineteen".