647758628109012 has 48 divisors (see below), whose sum is σ = 1727830500096512. Its totient is φ = 185023091052000.

The previous prime is 647758628108993. The next prime is 647758628109029. The reversal of 647758628109012 is 210901826857746.

647758628109012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×647758628109012² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1058081614 + ... + 1058693637.

Almost surely, 2^{647758628109012} is an apocalyptic number.

It is an amenable number.

647758628109012 is an abundant number, since it is smaller than the sum of its proper divisors (1080071871987500).

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

647758628109012 is a wasteful number, since it uses less digits than its factorization.

647758628109012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116778908 (or 2116778906 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 66.

The spelling of 647758628109012 in words is "six hundred forty-seven trillion, seven hundred fifty-eight billion, six hundred twenty-eight million, one hundred nine thousand, twelve".