8380722578 has 18 divisors (see below), whose sum is σ = 13271438151. Its totient is φ = 3968650764.

The previous prime is 8380722533. The next prime is 8380722599. The reversal of 8380722578 is 8752270838.

It can be written as a sum of positive squares in only one way, i.e., 4190361289 + 4190361289 = 64733^2 + 64733^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=64733.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon 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 8 ways as a sum of consecutive naturals, for example, 2458151 + ... + 2461557.

Almost surely, 2^8380722578 is an apocalyptic number.

8380722578 is a deficient number, since it is larger than the sum of its proper divisors (4890715573).

8380722578 is an frugal number, since it uses more digits than its factorization.

8380722578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6854 (or 3428 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 50.

The square root of 8380722578 is about 91546.2865330976. The cubic root of 8380722578 is about 2031.2364827402.

Multiplying 8380722578 by its sum of digits (50), we get a square (419036128900 = 647330²).

The spelling of 8380722578 in words is "eight billion, three hundred eighty million, seven hundred twenty-two thousand, five hundred seventy-eight".