561605061516 has 24 divisors (see below), whose sum is σ = 1316184555840. Its totient is φ = 186377009232.

The previous prime is 561605061503. The next prime is 561605061541. The reversal of 561605061516 is 615160506165.

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, 103081906 + ... + 103087353.

It is an arithmetic number, because the mean of its divisors is an integer number (54841023160).

Almost surely, 2^561605061516 is an apocalyptic number.

It is an amenable number.

561605061516 is an abundant number, since it is smaller than the sum of its proper divisors (754579494324).

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

561605061516 is a wasteful number, since it uses less digits than its factorization.

561605061516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206169493 (or 206169491 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 561605061516 in words is "five hundred sixty-one billion, six hundred five million, sixty-one thousand, five hundred sixteen".