561166728334 has 16 divisors (see below), whose sum is σ = 878550034320. Its totient is φ = 268574962240.

The previous prime is 561166728329. The next prime is 561166728347. The reversal of 561166728334 is 433827661165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64556944 + ... + 64565635.

It is an arithmetic number, because the mean of its divisors is an integer number (54909377145).

Almost surely, 2^561166728334 is an apocalyptic number.

561166728334 is a deficient number, since it is larger than the sum of its proper divisors (317383305986).

561166728334 is a wasteful number, since it uses less digits than its factorization.

561166728334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129122675.

The product of its digits is 4354560, while the sum is 52.

The spelling of 561166728334 in words is "five hundred sixty-one billion, one hundred sixty-six million, seven hundred twenty-eight thousand, three hundred thirty-four".