399402740511 has 64 divisors (see below), whose sum is σ = 639955289600. Its totient is φ = 248487639840.

The previous prime is 399402740447. The next prime is 399402740521. The reversal of 399402740511 is 115047204993.

399402740511 is a `hidden beast` number, since 3 + 9 + 94 + 0 + 2 + 7 + 40 + 511 = 666.

It is not a de Polignac number, because 399402740511 - 2⁶ = 399402740447 is a prime.

It is a super-2 number, since 2×399402740511² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399402740521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2712321 + ... + 2855781.

It is an arithmetic number, because the mean of its divisors is an integer number (9999301400).

Almost surely, 2^399402740511 is an apocalyptic number.

399402740511 is a deficient number, since it is larger than the sum of its proper divisors (240552549089).

399402740511 is an equidigital number, since it uses as much as digits as its factorization.

399402740511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143568 (or 143550 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 399402740511 in words is "three hundred ninety-nine billion, four hundred two million, seven hundred forty thousand, five hundred eleven".