395081612161 has 4 divisors (see below), whose sum is σ = 418321707012. Its totient is φ = 371841517312.

The previous prime is 395081612141. The next prime is 395081612171. The reversal of 395081612161 is 161216180593.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 246332549761 + 148749062400 = 496319^2 + 385680^2 .

It is a cyclic number.

It is not a de Polignac number, because 395081612161 - 2¹⁵ = 395081579393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (395081612141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11620047400 + ... + 11620047433.

It is an arithmetic number, because the mean of its divisors is an integer number (104580426753).

Almost surely, 2^395081612161 is an apocalyptic number.

It is an amenable number.

395081612161 is a deficient number, since it is larger than the sum of its proper divisors (23240094851).

395081612161 is a wasteful number, since it uses less digits than its factorization.

395081612161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23240094850.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 395081612161 in words is "three hundred ninety-five billion, eighty-one million, six hundred twelve thousand, one hundred sixty-one".