399709744901 has 16 divisors (see below), whose sum is σ = 407849904000. Its totient is φ = 391617128448.

The previous prime is 399709744877. The next prime is 399709744919. The reversal of 399709744901 is 109447907993.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399709744901 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 (399709744201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24814016 + ... + 24830118.

It is an arithmetic number, because the mean of its divisors is an integer number (25490619000).

Almost surely, 2^399709744901 is an apocalyptic number.

It is an amenable number.

399709744901 is a deficient number, since it is larger than the sum of its proper divisors (8140159099).

399709744901 is a wasteful number, since it uses less digits than its factorization.

399709744901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17548.

The product of its (nonzero) digits is 15431472, while the sum is 62.

The spelling of 399709744901 in words is "three hundred ninety-nine billion, seven hundred nine million, seven hundred forty-four thousand, nine hundred one".