495559561 has 8 divisors (see below), whose sum is σ = 566493824. Its totient is φ = 424660320.

The previous prime is 495559523. The next prime is 495559657. The reversal of 495559561 is 165955594.

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

It is not a de Polignac number, because 495559561 - 2¹⁵ = 495526793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (495529561) 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, 38821 + ... + 49981.

It is an arithmetic number, because the mean of its divisors is an integer number (70811728).

Almost surely, 2^495559561 is an apocalyptic number.

It is an amenable number.

495559561 is a deficient number, since it is larger than the sum of its proper divisors (70934263).

495559561 is a wasteful number, since it uses less digits than its factorization.

495559561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17511.

The product of its digits is 1215000, while the sum is 49.

The square root of 495559561 is about 22261.1671077686. The cubic root of 495559561 is about 791.3439501542.

It can be divided in two parts, 4955 and 59561, that added together give a square (64516 = 254²).

The spelling of 495559561 in words is "four hundred ninety-five million, five hundred fifty-nine thousand, five hundred sixty-one".