495131990161 has 8 divisors (see below), whose sum is σ = 497481270048. Its totient is φ = 492785700000.

The previous prime is 495131990153. The next prime is 495131990183. The reversal of 495131990161 is 161099131594.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 495131990161 - 2³ = 495131990153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (495131990191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415075 + ... + 1078216.

It is an arithmetic number, because the mean of its divisors is an integer number (62185158756).

Almost surely, 2^495131990161 is an apocalyptic number.

It is an amenable number.

495131990161 is a deficient number, since it is larger than the sum of its proper divisors (2349279887).

495131990161 is a wasteful number, since it uses less digits than its factorization.

495131990161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494863.

The product of its (nonzero) digits is 262440, while the sum is 49.

The spelling of 495131990161 in words is "four hundred ninety-five billion, one hundred thirty-one million, nine hundred ninety thousand, one hundred sixty-one".