561510101516 has 96 divisors (see below), whose sum is σ = 1226566871040. Its totient is φ = 218992460544.

The previous prime is 561510101441. The next prime is 561510101521. The reversal of 561510101516 is 615101015165.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19453391 + ... + 19482233.

It is an arithmetic number, because the mean of its divisors is an integer number (12776738240).

Almost surely, 2^561510101516 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 561510101516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (613283435520).

561510101516 is an abundant number, since it is smaller than the sum of its proper divisors (665056769524).

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

561510101516 is a wasteful number, since it uses less digits than its factorization.

561510101516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29623 (or 29621 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 561510101516 in words is "five hundred sixty-one billion, five hundred ten million, one hundred one thousand, five hundred sixteen".