645090295 has 16 divisors (see below), whose sum is σ = 791612352. Its totient is φ = 504474880.

The previous prime is 645090289. The next prime is 645090319. The reversal of 645090295 is 592090546.

It is not a de Polignac number, because 645090295 - 2³ = 645090287 is a prime.

It is a super-2 number, since 2×645090295² = 832282977406374050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70134 + ... + 78796.

It is an arithmetic number, because the mean of its divisors is an integer number (49475772).

Almost surely, 2^645090295 is an apocalyptic number.

645090295 is a deficient number, since it is larger than the sum of its proper divisors (146522057).

645090295 is a wasteful number, since it uses less digits than its factorization.

645090295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9002.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 645090295 is about 25398.6278172660. The cubic root of 645090295 is about 864.0525762294.

The spelling of 645090295 in words is "six hundred forty-five million, ninety thousand, two hundred ninety-five".