399771362217 has 16 divisors (see below), whose sum is σ = 535311322560. Its totient is φ = 265373938752.

The previous prime is 399771362173. The next prime is 399771362219. The reversal of 399771362217 is 712263177993.

It is not a de Polignac number, because 399771362217 - 2¹⁸ = 399771100073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399771362219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1303503 + ... + 1580715.

It is an arithmetic number, because the mean of its divisors is an integer number (33456957660).

Almost surely, 2^399771362217 is an apocalyptic number.

It is an amenable number.

399771362217 is a deficient number, since it is larger than the sum of its proper divisors (135539960343).

399771362217 is a wasteful number, since it uses less digits than its factorization.

399771362217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279272.

The product of its digits is 6001128, while the sum is 57.

The spelling of 399771362217 in words is "three hundred ninety-nine billion, seven hundred seventy-one million, three hundred sixty-two thousand, two hundred seventeen".