561251364 has 24 divisors (see below), whose sum is σ = 1309996128. Its totient is φ = 187025280.

The previous prime is 561251323. The next prime is 561251387. The reversal of 561251364 is 463152165.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51699 + ... + 61605.

It is an arithmetic number, because the mean of its divisors is an integer number (54583172).

Almost surely, 2^561251364 is an apocalyptic number.

It is an amenable number.

561251364 is an abundant number, since it is smaller than the sum of its proper divisors (748744764).

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

561251364 is a wasteful number, since it uses less digits than its factorization.

561251364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14635 (or 14633 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 561251364 is about 23690.7442685957. The cubic root of 561251364 is about 824.8705589390.

The spelling of 561251364 in words is "five hundred sixty-one million, two hundred fifty-one thousand, three hundred sixty-four".