490692561 has 16 divisors (see below), whose sum is σ = 659112960. Its totient is φ = 324708480.

The previous prime is 490692547. The next prime is 490692571. The reversal of 490692561 is 165296094.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-490692561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (490692541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474501 + ... + 475533.

It is an arithmetic number, because the mean of its divisors is an integer number (41194560).

Almost surely, 2^490692561 is an apocalyptic number.

It is an amenable number.

490692561 is a deficient number, since it is larger than the sum of its proper divisors (168420399).

490692561 is a wasteful number, since it uses less digits than its factorization.

490692561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 490692561 is about 22151.5814559593. The cubic root of 490692561 is about 788.7447678188.

The spelling of 490692561 in words is "four hundred ninety million, six hundred ninety-two thousand, five hundred sixty-one".