2164645250 has 16 divisors (see below), whose sum is σ = 4052216376. Its totient is φ = 865858000.

The previous prime is 2164645247. The next prime is 2164645297. The reversal of 2164645250 is 525464612.

It can be written as a sum of positive squares in 4 ways, for example, as 97397161 + 2067248089 = 9869^2 + 45467^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2164645250.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4329041 + ... + 4329540.

Almost surely, 2^2164645250 is an apocalyptic number.

2164645250 is a deficient number, since it is larger than the sum of its proper divisors (1887571126).

2164645250 is an equidigital number, since it uses as much as digits as its factorization.

2164645250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8658598 (or 8658588 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 2164645250 is about 46525.7482476102. The cubic root of 2164645250 is about 1293.5868068018.

The spelling of 2164645250 in words is "two billion, one hundred sixty-four million, six hundred forty-five thousand, two hundred fifty".