399751159144 has 16 divisors (see below), whose sum is σ = 749543542020. Its totient is φ = 199872881280.

The previous prime is 399751159133. The next prime is 399751159147. The reversal of 399751159144 is 441951157993.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 385439822244 + 14311336900 = 620838^2 + 119630^2 .

It is a super-2 number, since 2×399751159144² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (399751159147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382774 + ... + 972634.

Almost surely, 2^399751159144 is an apocalyptic number.

It is an amenable number.

399751159144 is a deficient number, since it is larger than the sum of its proper divisors (349792382876).

399751159144 is a wasteful number, since it uses less digits than its factorization.

399751159144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674580 (or 674576 counting only the distinct ones).

The product of its digits is 6123600, while the sum is 58.

The spelling of 399751159144 in words is "three hundred ninety-nine billion, seven hundred fifty-one million, one hundred fifty-nine thousand, one hundred forty-four".