399760943525 has 12 divisors (see below), whose sum is σ = 509100964932. Its totient is φ = 311165274240.

The previous prime is 399760943513. The next prime is 399760943537. The reversal of 399760943525 is 525349067993.

It is an interprime number because it is at equal distance from previous prime (399760943513) and next prime (399760943537).

It can be written as a sum of positive squares in 6 ways, for example, as 32465553124 + 367295390401 = 180182^2 + 606049^2 .

It is not a de Polignac number, because 399760943525 - 2¹⁰ = 399760942501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216086072 + ... + 216087921.

It is an arithmetic number, because the mean of its divisors is an integer number (42425080411).

Almost surely, 2^399760943525 is an apocalyptic number.

It is an amenable number.

399760943525 is a deficient number, since it is larger than the sum of its proper divisors (109340021407).

399760943525 is a wasteful number, since it uses less digits than its factorization.

399760943525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432174040 (or 432174035 counting only the distinct ones).

The product of its (nonzero) digits is 55112400, while the sum is 62.

The spelling of 399760943525 in words is "three hundred ninety-nine billion, seven hundred sixty million, nine hundred forty-three thousand, five hundred twenty-five".