399755587941 has 24 divisors (see below), whose sum is σ = 581875889400. Its totient is φ = 264452893056.

The previous prime is 399755587937. The next prime is 399755587943. The reversal of 399755587941 is 149785557993.

399755587941 is a `hidden beast` number, since 39 + 9 + 7 + 5 + 5 + 587 + 9 + 4 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 27111269025 + 372644318916 = 164655^2 + 610446^2 .

It is not a de Polignac number, because 399755587941 - 2² = 399755587937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399755587941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399755587943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1211295 + ... + 1505571.

It is an arithmetic number, because the mean of its divisors is an integer number (24244828725).

Almost surely, 2^399755587941 is an apocalyptic number.

It is an amenable number.

399755587941 is a deficient number, since it is larger than the sum of its proper divisors (182120301459).

399755587941 is a wasteful number, since it uses less digits than its factorization.

399755587941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295445 (or 295442 counting only the distinct ones).

The product of its digits is 428652000, while the sum is 72.

The spelling of 399755587941 in words is "three hundred ninety-nine billion, seven hundred fifty-five million, five hundred eighty-seven thousand, nine hundred forty-one".