561800745 has 32 divisors (see below), whose sum is σ = 1089555840. Its totient is φ = 272387520.

The previous prime is 561800741. The next prime is 561800749. The reversal of 561800745 is 547008165.

It is an interprime number because it is at equal distance from previous prime (561800741) and next prime (561800749).

It is not a de Polignac number, because 561800745 - 2² = 561800741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561800741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187674 + ... + 190643.

It is an arithmetic number, because the mean of its divisors is an integer number (34048620).

Almost surely, 2^561800745 is an apocalyptic number.

561800745 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

561800745 is a deficient number, since it is larger than the sum of its proper divisors (527755095).

561800745 is a wasteful number, since it uses less digits than its factorization.

561800745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378342 (or 378336 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 561800745 is about 23702.3362772533. The cubic root of 561800745 is about 825.1396127360.

The spelling of 561800745 in words is "five hundred sixty-one million, eight hundred thousand, seven hundred forty-five".