395401899979 has 16 divisors (see below), whose sum is σ = 404842636800. Its totient is φ = 386098574400.

The previous prime is 395401899967. The next prime is 395401899983. The reversal of 395401899979 is 979998104593.

It is a cyclic number.

It is not a de Polignac number, because 395401899979 - 2¹¹ = 395401897931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (395407899979) 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, 2414799 + ... + 2573335.

It is an arithmetic number, because the mean of its divisors is an integer number (25302664800).

Almost surely, 2^395401899979 is an apocalyptic number.

395401899979 is a deficient number, since it is larger than the sum of its proper divisors (9440736821).

395401899979 is a wasteful number, since it uses less digits than its factorization.

395401899979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158970.

The product of its (nonzero) digits is 198404640, while the sum is 73.

The spelling of 395401899979 in words is "three hundred ninety-five billion, four hundred one million, eight hundred ninety-nine thousand, nine hundred seventy-nine".