490681888561 has 8 divisors (see below), whose sum is σ = 499385728800. Its totient is φ = 481990955040.

The previous prime is 490681888553. The next prime is 490681888577. The reversal of 490681888561 is 165888186094.

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 490681888561 - 2³ = 490681888553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 490681888493 and 490681888502.

It is not an unprimeable number, because it can be changed into a prime (490681888061) 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, 3149955 + ... + 3302056.

It is an arithmetic number, because the mean of its divisors is an integer number (62423216100).

Almost surely, 2^490681888561 is an apocalyptic number.

It is an amenable number.

490681888561 is a deficient number, since it is larger than the sum of its proper divisors (8703840239).

490681888561 is a wasteful number, since it uses less digits than its factorization.

490681888561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453359.

The product of its (nonzero) digits is 26542080, while the sum is 64.

The spelling of 490681888561 in words is "four hundred ninety billion, six hundred eighty-one million, eight hundred eighty-eight thousand, five hundred sixty-one".