395895878981 has 4 divisors (see below), whose sum is σ = 395897424000. Its totient is φ = 395894333964.

The previous prime is 395895878953. The next prime is 395895878993. The reversal of 395895878981 is 189878598593.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 395895878981 - 2²² = 395891684677 is a prime.

It is a super-2 number, since 2×395895878981² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 395895878896 and 395895878905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395895878921) 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, 286031 + ... + 934668.

It is an arithmetic number, because the mean of its divisors is an integer number (98974356000).

Almost surely, 2^395895878981 is an apocalyptic number.

It is an amenable number.

395895878981 is a deficient number, since it is larger than the sum of its proper divisors (1545019).

395895878981 is a wasteful number, since it uses less digits than its factorization.

395895878981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545018.

The product of its digits is 1567641600, while the sum is 80.

The spelling of 395895878981 in words is "three hundred ninety-five billion, eight hundred ninety-five million, eight hundred seventy-eight thousand, nine hundred eighty-one".