646389647716 has 24 divisors (see below), whose sum is σ = 1155790895616. Its totient is φ = 316170121920.

The previous prime is 646389647699. The next prime is 646389647741. The reversal of 646389647716 is 617746983646.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402700 + ... + 1206211.

It is an arithmetic number, because the mean of its divisors is an integer number (48157953984).

Almost surely, 2^646389647716 is an apocalyptic number.

It is an amenable number.

646389647716 is a deficient number, since it is larger than the sum of its proper divisors (509401247900).

646389647716 is a wasteful number, since it uses less digits than its factorization.

646389647716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611099 (or 1611097 counting only the distinct ones).

The product of its digits is 219469824, while the sum is 67.

The spelling of 646389647716 in words is "six hundred forty-six billion, three hundred eighty-nine million, six hundred forty-seven thousand, seven hundred sixteen".