78590864645 has 16 divisors (see below), whose sum is σ = 98631637632. Its totient is φ = 60003303360.

The previous prime is 78590864591. The next prime is 78590864657. The reversal of 78590864645 is 54646809587.

It is not a de Polignac number, because 78590864645 - 2⁶ = 78590864581 is a prime.

It is a Duffinian number.

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, 720386 + ... + 822275.

It is an arithmetic number, because the mean of its divisors is an integer number (6164477352).

Almost surely, 2^78590864645 is an apocalyptic number.

It is an amenable number.

78590864645 is a deficient number, since it is larger than the sum of its proper divisors (20040772987).

78590864645 is a wasteful number, since it uses less digits than its factorization.

78590864645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543132.

The product of its (nonzero) digits is 58060800, while the sum is 62.

The spelling of 78590864645 in words is "seventy-eight billion, five hundred ninety million, eight hundred sixty-four thousand, six hundred forty-five".