395401779409 has 16 divisors (see below), whose sum is σ = 486779335168. Its totient is φ = 312761155392.

The previous prime is 395401779407. The next prime is 395401779433. The reversal of 395401779409 is 904977104593.

It is not a de Polignac number, because 395401779409 - 2¹ = 395401779407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (395401779407) 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, 243762 + ... + 922075.

It is an arithmetic number, because the mean of its divisors is an integer number (30423708448).

Almost surely, 2^395401779409 is an apocalyptic number.

It is an amenable number.

395401779409 is a deficient number, since it is larger than the sum of its proper divisors (91377555759).

395401779409 is a wasteful number, since it uses less digits than its factorization.

395401779409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169584.

The product of its (nonzero) digits is 8573040, while the sum is 58.

The spelling of 395401779409 in words is "three hundred ninety-five billion, four hundred one million, seven hundred seventy-nine thousand, four hundred nine".