561773634 has 8 divisors (see below), whose sum is σ = 1123547280. Its totient is φ = 187257876.

The previous prime is 561773623. The next prime is 561773669. The reversal of 561773634 is 436377165.

It is a happy number.

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

561773634 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46814464 + ... + 46814475.

It is an arithmetic number, because the mean of its divisors is an integer number (140443410).

Almost surely, 2^561773634 is an apocalyptic number.

561773634 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

561773634 is a wasteful number, since it uses less digits than its factorization.

561773634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93628944.

The product of its digits is 317520, while the sum is 42.

The square root of 561773634 is about 23701.7643647050. The cubic root of 561773634 is about 825.1263395129.

The spelling of 561773634 in words is "five hundred sixty-one million, seven hundred seventy-three thousand, six hundred thirty-four".