645106088 has 64 divisors (see below), whose sum is σ = 1394193600. Its totient is φ = 276756480.

The previous prime is 645106043. The next prime is 645106097. The reversal of 645106088 is 880601546.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 589670 + ... + 590762.

It is an arithmetic number, because the mean of its divisors is an integer number (21784275).

Almost surely, 2^645106088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645106088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (697096800).

645106088 is an abundant number, since it is smaller than the sum of its proper divisors (749087512).

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

645106088 is a wasteful number, since it uses less digits than its factorization.

645106088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482 (or 1478 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 645106088 is about 25398.9387179858. The cubic root of 645106088 is about 864.0596273720.

The spelling of 645106088 in words is "six hundred forty-five million, one hundred six thousand, eighty-eight".