561512620320 has 48 divisors (see below), whose sum is σ = 1768764755520. Its totient is φ = 149736698624.

The previous prime is 561512620307. The next prime is 561512620337. The reversal of 561512620320 is 23026215165.

It is a tau number, because it is divible by the number of its divisors (48).

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, 584908500 + ... + 584909459.

It is an arithmetic number, because the mean of its divisors is an integer number (36849265740).

Almost surely, 2^561512620320 is an apocalyptic number.

It is an amenable number.

561512620320 is an abundant number, since it is smaller than the sum of its proper divisors (1207252135200).

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

561512620320 is a wasteful number, since it uses less digits than its factorization.

561512620320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169817977 (or 1169817969 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 561512620320 its reverse (23026215165), we get a palindrome (584538835485).

The spelling of 561512620320 in words is "five hundred sixty-one billion, five hundred twelve million, six hundred twenty thousand, three hundred twenty".