561707051520 has 160 divisors (see below), whose sum is σ = 1825146576000. Its totient is φ = 147332874240.

The previous prime is 561707051501. The next prime is 561707051567. The reversal of 561707051520 is 25150707165.

It is a tau number, because it is divible by the number of its divisors (160).

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 15 ways as a sum of consecutive naturals, for example, 131020 + ... + 1067979.

It is an arithmetic number, because the mean of its divisors is an integer number (11407166100).

Almost surely, 2^561707051520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561707051520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (912573288000).

561707051520 is an abundant number, since it is smaller than the sum of its proper divisors (1263439524480).

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

561707051520 is a wasteful number, since it uses less digits than its factorization.

561707051520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199086 (or 1199070 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 39.

Adding to 561707051520 its reverse (25150707165), we get a palindrome (586857758685).

The spelling of 561707051520 in words is "five hundred sixty-one billion, seven hundred seven million, fifty-one thousand, five hundred twenty".