65115517994 has 16 divisors (see below), whose sum is σ = 107284150080. Its totient is φ = 29503140480.

The previous prime is 65115517967. The next prime is 65115518009. The reversal of 65115517994 is 49971551156.

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, 37250567 + ... + 37252314.

It is an arithmetic number, because the mean of its divisors is an integer number (6705259380).

Almost surely, 2^65115517994 is an apocalyptic number.

65115517994 is a deficient number, since it is larger than the sum of its proper divisors (42168632086).

65115517994 is a wasteful number, since it uses less digits than its factorization.

65115517994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74502925.

The product of its digits is 1701000, while the sum is 53.

The spelling of 65115517994 in words is "sixty-five billion, one hundred fifteen million, five hundred seventeen thousand, nine hundred ninety-four".