561764357 has 16 divisors (see below), whose sum is σ = 701281152. Its totient is φ = 437176320.

The previous prime is 561764353. The next prime is 561764383. The reversal of 561764357 is 753467165.

It is not a de Polignac number, because 561764357 - 2² = 561764353 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561764353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61733 + ... + 70245.

It is an arithmetic number, because the mean of its divisors is an integer number (43830072).

Almost surely, 2^561764357 is an apocalyptic number.

It is an amenable number.

561764357 is a deficient number, since it is larger than the sum of its proper divisors (139516795).

561764357 is a wasteful number, since it uses less digits than its factorization.

561764357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9388.

The product of its digits is 529200, while the sum is 44.

The square root of 561764357 is about 23701.5686611667. The cubic root of 561764357 is about 825.1217975060.

The spelling of 561764357 in words is "five hundred sixty-one million, seven hundred sixty-four thousand, three hundred fifty-seven".