647645802 has 8 divisors (see below), whose sum is σ = 1295291616. Its totient is φ = 215881932.

The previous prime is 647645797. The next prime is 647645809. The reversal of 647645802 is 208546746.

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

647645802 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (647645809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53970478 + ... + 53970489.

It is an arithmetic number, because the mean of its divisors is an integer number (161911452).

Almost surely, 2^647645802 is an apocalyptic number.

647645802 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.

647645802 is a wasteful number, since it uses less digits than its factorization.

647645802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107940972.

The product of its (nonzero) digits is 322560, while the sum is 42.

The square root of 647645802 is about 25448.8860659951. The cubic root of 647645802 is about 865.1920461915.

The spelling of 647645802 in words is "six hundred forty-seven million, six hundred forty-five thousand, eight hundred two".