647851574412 has 96 divisors (see below), whose sum is σ = 1964201254400. Its totient is φ = 180795779136.

The previous prime is 647851574401. The next prime is 647851574417. The reversal of 647851574412 is 214475158746.

It is a happy number.

647851574412 is a `hidden beast` number, since 6 + 4 + 7 + 8 + 51 + 574 + 4 + 12 = 666.

647851574412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (647851574417) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9931987 + ... + 9997002.

Almost surely, 2^647851574412 is an apocalyptic number.

It is an amenable number.

647851574412 is an abundant number, since it is smaller than the sum of its proper divisors (1316349679988).

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

647851574412 is a wasteful number, since it uses less digits than its factorization.

647851574412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19929052 (or 19929044 counting only the distinct ones).

The product of its digits is 7526400, while the sum is 54.

The spelling of 647851574412 in words is "six hundred forty-seven billion, eight hundred fifty-one million, five hundred seventy-four thousand, four hundred twelve".