645490702 has 8 divisors (see below), whose sum is σ = 975202200. Its totient is φ = 320423304.

The previous prime is 645490693. The next prime is 645490721. The reversal of 645490702 is 207094546.

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, 1160677 + ... + 1161232.

It is an arithmetic number, because the mean of its divisors is an integer number (121900275).

Almost surely, 2^645490702 is an apocalyptic number.

645490702 is a deficient number, since it is larger than the sum of its proper divisors (329711498).

645490702 is a wasteful number, since it uses less digits than its factorization.

645490702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2322050.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 645490702 is about 25406.5090478798. The cubic root of 645490702 is about 864.2313114885.

The spelling of 645490702 in words is "six hundred forty-five million, four hundred ninety thousand, seven hundred two".