561565050 has 72 divisors (see below), whose sum is σ = 1410439488. Its totient is φ = 147864000.

The previous prime is 561565049. The next prime is 561565073. The reversal of 561565050 is 50565165.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1529967 + ... + 1530333.

Almost surely, 2^561565050 is an apocalyptic number.

561565050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 561565050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (705219744).

561565050 is an abundant number, since it is smaller than the sum of its proper divisors (848874438).

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

561565050 is a wasteful number, since it uses less digits than its factorization.

561565050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 561565050 is about 23697.3637774331. The cubic root of 561565050 is about 825.0242049831.

The spelling of 561565050 in words is "five hundred sixty-one million, five hundred sixty-five thousand, fifty".