561601494 has 24 divisors (see below), whose sum is σ = 1288380600. Its totient is φ = 176188608.

The previous prime is 561601459. The next prime is 561601499. The reversal of 561601494 is 494106165.

561601494 is a `hidden beast` number, since 5 + 6 + 1 + 601 + 49 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561601499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 917344 + ... + 917955.

It is an arithmetic number, because the mean of its divisors is an integer number (53682525).

Almost surely, 2^561601494 is an apocalyptic number.

561601494 is an abundant number, since it is smaller than the sum of its proper divisors (726779106).

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

561601494 is a wasteful number, since it uses less digits than its factorization.

561601494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835324 (or 1835321 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 561601494 is about 23698.1327112496. The cubic root of 561601494 is about 825.0420518510.

The spelling of 561601494 in words is "five hundred sixty-one million, six hundred one thousand, four hundred ninety-four".