322780120649 has 12 divisors (see below), whose sum is σ = 375731169300. Its totient is φ = 276482803968.

The previous prime is 322780120639. The next prime is 322780120669. The reversal of 322780120649 is 946021087223.

It can be written as a sum of positive squares in 2 ways, for example, as 78380401225 + 244399719424 = 279965^2 + 494368^2 .

It is not a de Polignac number, because 322780120649 - 2⁴ = 322780120633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (322780120639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2139044 + ... + 2284965.

It is an arithmetic number, because the mean of its divisors is an integer number (31310930775).

Almost surely, 2^322780120649 is an apocalyptic number.

It is an amenable number.

322780120649 is a deficient number, since it is larger than the sum of its proper divisors (52951048651).

322780120649 is a wasteful number, since it uses less digits than its factorization.

322780120649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4425512 (or 4425505 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 322780120649 in words is "three hundred twenty-two billion, seven hundred eighty million, one hundred twenty thousand, six hundred forty-nine".