395401779411 has 16 divisors (see below), whose sum is σ = 555229315200. Its totient is φ = 249601687488.

The previous prime is 395401779407. The next prime is 395401779433. The reversal of 395401779411 is 114977104593.

It is a happy number.

It is not a de Polignac number, because 395401779411 - 2² = 395401779407 is a prime.

It is a super-2 number, since 2×395401779411² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (395401779511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1632306 + ... + 1858823.

It is an arithmetic number, because the mean of its divisors is an integer number (34701832200).

Almost surely, 2^395401779411 is an apocalyptic number.

395401779411 is a deficient number, since it is larger than the sum of its proper divisors (159827535789).

395401779411 is a wasteful number, since it uses less digits than its factorization.

395401779411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3493138.

The product of its (nonzero) digits is 952560, while the sum is 51.

The spelling of 395401779411 in words is "three hundred ninety-five billion, four hundred one million, seven hundred seventy-nine thousand, four hundred eleven".