561477620 has 24 divisors (see below), whose sum is σ = 1286294688. Its totient is φ = 204173600.

The previous prime is 561477589. The next prime is 561477731. The reversal of 561477620 is 26774165.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1275866 + ... + 1276305.

It is an arithmetic number, because the mean of its divisors is an integer number (53595612).

Almost surely, 2^561477620 is an apocalyptic number.

It is an amenable number.

561477620 is an abundant number, since it is smaller than the sum of its proper divisors (724817068).

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

561477620 is a wasteful number, since it uses less digits than its factorization.

561477620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552191 (or 2552189 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 561477620 is about 23695.5189856648. The cubic root of 561477620 is about 824.9813867854.

The spelling of 561477620 in words is "five hundred sixty-one million, four hundred seventy-seven thousand, six hundred twenty".