646736802 has 8 divisors (see below), whose sum is σ = 1293473616. Its totient is φ = 215578932.

The previous prime is 646736791. The next prime is 646736809. The reversal of 646736802 is 208637646.

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

646736802 is an admirable number.

It is a super-3 number, since 3×646736802³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (646736809) 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, 53894728 + ... + 53894739.

It is an arithmetic number, because the mean of its divisors is an integer number (161684202).

Almost surely, 2^646736802 is an apocalyptic number.

646736802 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.

646736802 is a wasteful number, since it uses less digits than its factorization.

646736802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107789472.

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 646736802 is about 25431.0204671382. The cubic root of 646736802 is about 864.7870780239.

The spelling of 646736802 in words is "six hundred forty-six million, seven hundred thirty-six thousand, eight hundred two".