8620778313 has 36 divisors (see below), whose sum is σ = 14705106624. Its totient is φ = 4767217200.

The previous prime is 8620778273. The next prime is 8620778329. The reversal of 8620778313 is 3138770268.

8620778313 is a `hidden beast` number, since 8 + 620 + 7 + 7 + 8 + 3 + 13 = 666.

It is not a de Polignac number, because 8620778313 - 2⁹ = 8620777801 is a prime.

It is a super-2 number, since 2×8620778313² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8620774313) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10653 + ... + 131738.

It is an arithmetic number, because the mean of its divisors is an integer number (408475184).

Almost surely, 2^8620778313 is an apocalyptic number.

It is an amenable number.

8620778313 is a deficient number, since it is larger than the sum of its proper divisors (6084328311).

8620778313 is a wasteful number, since it uses less digits than its factorization.

8620778313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142466 (or 142432 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 8620778313 is about 92848.1465243114. The cubic root of 8620778313 is about 2050.4483106776.

The spelling of 8620778313 in words is "eight billion, six hundred twenty million, seven hundred seventy-eight thousand, three hundred thirteen".