561496020 has 24 divisors (see below), whose sum is σ = 1572189024. Its totient is φ = 149732256.

The previous prime is 561495997. The next prime is 561496027. The reversal of 561496020 is 20694165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561496027) by changing a digit.

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, 4679074 + ... + 4679193.

It is an arithmetic number, because the mean of its divisors is an integer number (65507876).

Almost surely, 2^561496020 is an apocalyptic number.

It is an amenable number.

561496020 is an abundant number, since it is smaller than the sum of its proper divisors (1010693004).

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

561496020 is a wasteful number, since it uses less digits than its factorization.

561496020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9358279 (or 9358277 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 561496020 is about 23695.9072415470. The cubic root of 561496020 is about 824.9903984190.

The spelling of 561496020 in words is "five hundred sixty-one million, four hundred ninety-six thousand, twenty".