399725845968 has 160 divisors (see below), whose sum is σ = 1077932277760. Its totient is φ = 127496540160.

The previous prime is 399725845963. The next prime is 399725845973. The reversal of 399725845968 is 869548527993.

It is an interprime number because it is at equal distance from previous prime (399725845963) and next prime (399725845973).

It is a self number, because there is not a number n which added to its sum of digits gives 399725845968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399725845963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126134688 + ... + 126137856.

It is an arithmetic number, because the mean of its divisors is an integer number (6737076736).

Almost surely, 2^399725845968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399725845968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (538966138880).

399725845968 is an abundant number, since it is smaller than the sum of its proper divisors (678206431792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399725845968 is a wasteful number, since it uses less digits than its factorization.

399725845968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137 (or 4131 counting only the distinct ones).

The product of its digits is 1175731200, while the sum is 75.

The spelling of 399725845968 in words is "three hundred ninety-nine billion, seven hundred twenty-five million, eight hundred forty-five thousand, nine hundred sixty-eight".