561665010 has 32 divisors (see below), whose sum is σ = 1360370880. Its totient is φ = 148402368.

The previous prime is 561664969. The next prime is 561665033. The reversal of 561665010 is 10566165.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82612 + ... + 89151.

It is an arithmetic number, because the mean of its divisors is an integer number (42511590).

Almost surely, 2^561665010 is an apocalyptic number.

561665010 is an abundant number, since it is smaller than the sum of its proper divisors (798705870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561665010 is a wasteful number, since it uses less digits than its factorization.

561665010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171882.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 561665010 is about 23699.4727789459. The cubic root of 561665010 is about 825.0731542110.

The spelling of 561665010 in words is "five hundred sixty-one million, six hundred sixty-five thousand, ten".