2645238312 has 24 divisors (see below), whose sum is σ = 7164187290. Its totient is φ = 881746080.

The previous prime is 2645238289. The next prime is 2645238313. The reversal of 2645238312 is 2138325462.

2645238312 is a `hidden beast` number, since 2 + 645 + 2 + 3 + 8 + 3 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2356714116 + 288524196 = 48546^2 + 16986^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-4 number, since 4×2645238312⁴ (a number of 39 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2645238313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18369639 + ... + 18369782.

Almost surely, 2^2645238312 is an apocalyptic number.

It is an amenable number.

2645238312 is an abundant number, since it is smaller than the sum of its proper divisors (4518948978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2645238312 is a wasteful number, since it uses less digits than its factorization.

2645238312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36739433 (or 36739426 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 2645238312 is about 51431.8803078402. The cubic root of 2645238312 is about 1382.9981570424.

The spelling of 2645238312 in words is "two billion, six hundred forty-five million, two hundred thirty-eight thousand, three hundred twelve".