645743102 has 8 divisors (see below), whose sum is σ = 969788376. Its totient is φ = 322480312.

The previous prime is 645743093. The next prime is 645743123. The reversal of 645743102 is 201347546.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193553 + ... + 196860.

It is an arithmetic number, because the mean of its divisors is an integer number (121223547).

Almost surely, 2^645743102 is an apocalyptic number.

645743102 is a deficient number, since it is larger than the sum of its proper divisors (324045274).

645743102 is a wasteful number, since it uses less digits than its factorization.

645743102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391242.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 645743102 is about 25411.4757934284. The cubic root of 645743102 is about 864.3439408195.

It can be divided in two parts, 64574 and 3102, that added together give a palindrome (67676).

The spelling of 645743102 in words is "six hundred forty-five million, seven hundred forty-three thousand, one hundred two".