8780837728065 has 16 divisors (see below), whose sum is σ = 15130058854848. Its totient is φ = 4322873958336.

The previous prime is 8780837728051. The next prime is 8780837728081. The reversal of 8780837728065 is 5608277380878.

It is not a de Polignac number, because 8780837728065 - 2¹⁵ = 8780837695297 is a prime.

It is a super-2 number, since 2×8780837728065² (a number of 27 digits) contains 22 as substring.

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, 22514968339 + ... + 22514968728.

It is an arithmetic number, because the mean of its divisors is an integer number (945628678428).

Almost surely, 2^{8780837728065} is an apocalyptic number.

It is an amenable number.

8780837728065 is a deficient number, since it is larger than the sum of its proper divisors (6349221126783).

8780837728065 is a wasteful number, since it uses less digits than its factorization.

8780837728065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45029937088.

The product of its (nonzero) digits is 252887040, while the sum is 69.

The spelling of 8780837728065 in words is "eight trillion, seven hundred eighty billion, eight hundred thirty-seven million, seven hundred twenty-eight thousand, sixty-five".