65378886518 has 32 divisors (see below), whose sum is σ = 114710722560. Its totient is φ = 27615519360.

The previous prime is 65378886493. The next prime is 65378886557. The reversal of 65378886518 is 81568887356.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1076846 + ... + 1135937.

It is an arithmetic number, because the mean of its divisors is an integer number (3584710080).

Almost surely, 2^65378886518 is an apocalyptic number.

65378886518 is a deficient number, since it is larger than the sum of its proper divisors (49331836042).

65378886518 is a wasteful number, since it uses less digits than its factorization.

65378886518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212892.

The product of its digits is 77414400, while the sum is 65.

The spelling of 65378886518 in words is "sixty-five billion, three hundred seventy-eight million, eight hundred eighty-six thousand, five hundred eighteen".