645145262 has 8 divisors (see below), whose sum is σ = 1009792656. Its totient is φ = 308547712.

The previous prime is 645145261. The next prime is 645145279. The reversal of 645145262 is 262541546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645145261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7012403 + ... + 7012494.

It is an arithmetic number, because the mean of its divisors is an integer number (126224082).

Almost surely, 2^645145262 is an apocalyptic number.

645145262 is a deficient number, since it is larger than the sum of its proper divisors (364647394).

645145262 is a wasteful number, since it uses less digits than its factorization.

645145262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14024922.

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

The square root of 645145262 is about 25399.7098802329. The cubic root of 645145262 is about 864.0771169950.

The spelling of 645145262 in words is "six hundred forty-five million, one hundred forty-five thousand, two hundred sixty-two".