399764380751 has 8 divisors (see below), whose sum is σ = 411128972544. Its totient is φ = 388429270560.

The previous prime is 399764380733. The next prime is 399764380793. The reversal of 399764380751 is 157083467993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399764380751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399764380151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7342895 + ... + 7397136.

It is an arithmetic number, because the mean of its divisors is an integer number (51391121568).

Almost surely, 2^399764380751 is an apocalyptic number.

399764380751 is a deficient number, since it is larger than the sum of its proper divisors (11364591793).

399764380751 is a wasteful number, since it uses less digits than its factorization.

399764380751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14740801.

The product of its (nonzero) digits is 34292160, while the sum is 62.

The spelling of 399764380751 in words is "three hundred ninety-nine billion, seven hundred sixty-four million, three hundred eighty thousand, seven hundred fifty-one".