61510605616 has 20 divisors (see below), whose sum is σ = 119201832400. Its totient is φ = 30748842432.

The previous prime is 61510605599. The next prime is 61510605631. The reversal of 61510605616 is 61650601516.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324756 + ... + 478003.

It is an arithmetic number, because the mean of its divisors is an integer number (5960091620).

Almost surely, 2^61510605616 is an apocalyptic number.

It is an amenable number.

61510605616 is a deficient number, since it is larger than the sum of its proper divisors (57691226784).

61510605616 is a wasteful number, since it uses less digits than its factorization.

61510605616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807556 (or 807550 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 61510605616 in words is "sixty-one billion, five hundred ten million, six hundred five thousand, six hundred sixteen".