647814499028 has 48 divisors (see below), whose sum is σ = 1171752341760. Its totient is φ = 313218921600.

The previous prime is 647814499021. The next prime is 647814499039. The reversal of 647814499028 is 820994418746.

It is a super-2 number, since 2×647814499028² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647814499021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9529238 + ... + 9596978.

It is an arithmetic number, because the mean of its divisors is an integer number (24411507120).

Almost surely, 2^647814499028 is an apocalyptic number.

It is an amenable number.

647814499028 is a deficient number, since it is larger than the sum of its proper divisors (523937842732).

647814499028 is a wasteful number, since it uses less digits than its factorization.

647814499028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68448 (or 68446 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 62.

The spelling of 647814499028 in words is "six hundred forty-seven billion, eight hundred fourteen million, four hundred ninety-nine thousand, twenty-eight".