645929022 has 8 divisors (see below), whose sum is σ = 1291858056. Its totient is φ = 215309672.

The previous prime is 645929021. The next prime is 645929029. The reversal of 645929022 is 220929546.

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

645929022 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645929021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53827413 + ... + 53827424.

It is an arithmetic number, because the mean of its divisors is an integer number (161482257).

Almost surely, 2^645929022 is an apocalyptic number.

645929022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

645929022 is a wasteful number, since it uses less digits than its factorization.

645929022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107654842.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 645929022 is about 25415.1337198922. The cubic root of 645929022 is about 864.4268857785.

The spelling of 645929022 in words is "six hundred forty-five million, nine hundred twenty-nine thousand, twenty-two".