61417716778 has 16 divisors (see below), whose sum is σ = 101878456896. Its totient is φ = 27534716640.

The previous prime is 61417716751. The next prime is 61417716791. The reversal of 61417716778 is 87761771416.

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, 19119726 + ... + 19122937.

It is an arithmetic number, because the mean of its divisors is an integer number (6367403556).

Almost surely, 2^61417716778 is an apocalyptic number.

61417716778 is a deficient number, since it is larger than the sum of its proper divisors (40460740118).

61417716778 is a wasteful number, since it uses less digits than its factorization.

61417716778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38242749.

The product of its digits is 2765952, while the sum is 55.

The spelling of 61417716778 in words is "sixty-one billion, four hundred seventeen million, seven hundred sixteen thousand, seven hundred seventy-eight".