561527394 has 16 divisors (see below), whose sum is σ = 1128936960. Its totient is φ = 186195440.

The previous prime is 561527371. The next prime is 561527401. The reversal of 561527394 is 493725165.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243849 + ... + 246140.

It is an arithmetic number, because the mean of its divisors is an integer number (70558560).

Almost surely, 2^561527394 is an apocalyptic number.

561527394 is an abundant number, since it is smaller than the sum of its proper divisors (567409566).

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

561527394 is a wasteful number, since it uses less digits than its factorization.

561527394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490185.

The product of its digits is 226800, while the sum is 42.

The square root of 561527394 is about 23696.5692453570. The cubic root of 561527394 is about 825.0057637798.

It can be divided in two parts, 56152 and 7394, that added together give a triangular number (63546 = T₃₅₆).

The spelling of 561527394 in words is "five hundred sixty-one million, five hundred twenty-seven thousand, three hundred ninety-four".