645712062 has 16 divisors (see below), whose sum is σ = 1300093200. Its totient is φ = 213792512.

The previous prime is 645712061. The next prime is 645712079. The reversal of 645712062 is 260217546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645712061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360243 + ... + 362030.

It is an arithmetic number, because the mean of its divisors is an integer number (81255825).

Almost surely, 2^645712062 is an apocalyptic number.

645712062 is an abundant number, since it is smaller than the sum of its proper divisors (654381138).

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

645712062 is a wasteful number, since it uses less digits than its factorization.

645712062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722427.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 645712062 is about 25410.8650384043. The cubic root of 645712062 is about 864.3300913151.

The spelling of 645712062 in words is "six hundred forty-five million, seven hundred twelve thousand, sixty-two".