8013780621064 has 16 divisors (see below), whose sum is σ = 15031481152320. Its totient is φ = 4005385647120.

The previous prime is 8013780621047. The next prime is 8013780621109. The reversal of 8013780621064 is 4601260873108.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188060292 + ... + 188102899.

It is an arithmetic number, because the mean of its divisors is an integer number (939467572020).

Almost surely, 2^{8013780621064} is an apocalyptic number.

It is an amenable number.

8013780621064 is a deficient number, since it is larger than the sum of its proper divisors (7017700531256).

8013780621064 is a wasteful number, since it uses less digits than its factorization.

8013780621064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376165860 (or 376165856 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 8013780621064 in words is "eight trillion, thirteen billion, seven hundred eighty million, six hundred twenty-one thousand, sixty-four".