561713820531 has 32 divisors (see below), whose sum is σ = 805243120128. Its totient is φ = 347023111680.

The previous prime is 561713820509. The next prime is 561713820539. The reversal of 561713820531 is 135028317165.

It is not a de Polignac number, because 561713820531 - 2¹³ = 561713812339 is a prime.

It is a super-2 number, since 2×561713820531² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (561713820539) 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 31 ways as a sum of consecutive naturals, for example, 2638636 + ... + 2843558.

It is an arithmetic number, because the mean of its divisors is an integer number (25163847504).

Almost surely, 2^561713820531 is an apocalyptic number.

561713820531 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

561713820531 is a deficient number, since it is larger than the sum of its proper divisors (243529299597).

561713820531 is a wasteful number, since it uses less digits than its factorization.

561713820531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205771.

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 561713820531 in words is "five hundred sixty-one billion, seven hundred thirteen million, eight hundred twenty thousand, five hundred thirty-one".