645750082 has 16 divisors (see below), whose sum is σ = 992967192. Its totient is φ = 314772480.

The previous prime is 645750073. The next prime is 645750109. The reversal of 645750082 is 280057546.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 511166881 + 134583201 = 22609^2 + 11601^2 .

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, 193258 + ... + 196570.

Almost surely, 2^645750082 is an apocalyptic number.

645750082 is a deficient number, since it is larger than the sum of its proper divisors (347217110).

645750082 is a wasteful number, since it uses less digits than its factorization.

645750082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5733.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 645750082 is about 25411.6131325817. The cubic root of 645750082 is about 864.3470551121.

The spelling of 645750082 in words is "six hundred forty-five million, seven hundred fifty thousand, eighty-two".