647638147212 has 24 divisors (see below), whose sum is σ = 1727035059456. Its totient is φ = 185039470608.

The previous prime is 647638147207. The next prime is 647638147231. The reversal of 647638147212 is 212741836746.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3854988888 + ... + 3854989055.

It is an arithmetic number, because the mean of its divisors is an integer number (71959794144).

Almost surely, 2^647638147212 is an apocalyptic number.

It is an amenable number.

647638147212 is an abundant number, since it is smaller than the sum of its proper divisors (1079396912244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647638147212 is a wasteful number, since it uses less digits than its factorization.

647638147212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7709977957 (or 7709977955 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 51.

The spelling of 647638147212 in words is "six hundred forty-seven billion, six hundred thirty-eight million, one hundred forty-seven thousand, two hundred twelve".