561630245 has 16 divisors (see below), whose sum is σ = 745301952. Its totient is φ = 402860160.

The previous prime is 561630161. The next prime is 561630271. The reversal of 561630245 is 542036165.

It is not a de Polignac number, because 561630245 - 2¹⁶ = 561564709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65927 + ... + 73956.

It is an arithmetic number, because the mean of its divisors is an integer number (46581372).

Almost surely, 2^561630245 is an apocalyptic number.

561630245 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

561630245 is a deficient number, since it is larger than the sum of its proper divisors (183671707).

561630245 is a wasteful number, since it uses less digits than its factorization.

561630245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139972.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 561630245 is about 23698.7393124613. The cubic root of 561630245 is about 825.0561308610.

The spelling of 561630245 in words is "five hundred sixty-one million, six hundred thirty thousand, two hundred forty-five".