561927821934 has 16 divisors (see below), whose sum is σ = 1162609287120. Its totient is φ = 180850333440.

The previous prime is 561927821933. The next prime is 561927821957. The reversal of 561927821934 is 439128729165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561927821933) 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 7 ways as a sum of consecutive naturals, for example, 1614734947 + ... + 1614735294.

It is an arithmetic number, because the mean of its divisors is an integer number (72663080445).

Almost surely, 2^561927821934 is an apocalyptic number.

561927821934 is an abundant number, since it is smaller than the sum of its proper divisors (600681465186).

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

561927821934 is a wasteful number, since it uses less digits than its factorization.

561927821934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3229470275.

The product of its digits is 6531840, while the sum is 57.

The spelling of 561927821934 in words is "five hundred sixty-one billion, nine hundred twenty-seven million, eight hundred twenty-one thousand, nine hundred thirty-four".