495217572521 has 8 divisors (see below), whose sum is σ = 575241021504. Its totient is φ = 417513643920.

The previous prime is 495217572461. The next prime is 495217572527. The reversal of 495217572521 is 125275712594.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-495217572521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 495217572521.

It is not an unprimeable number, because it can be changed into a prime (495217572527) 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, 579879635 + ... + 579880488.

It is an arithmetic number, because the mean of its divisors is an integer number (71905127688).

Almost surely, 2^495217572521 is an apocalyptic number.

It is an amenable number.

495217572521 is a deficient number, since it is larger than the sum of its proper divisors (80023448983).

495217572521 is a wasteful number, since it uses less digits than its factorization.

495217572521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159760191.

The product of its digits is 1764000, while the sum is 50.

The spelling of 495217572521 in words is "four hundred ninety-five billion, two hundred seventeen million, five hundred seventy-two thousand, five hundred twenty-one".