647198785368 has 64 divisors (see below), whose sum is σ = 1846362924000. Its totient is φ = 209902306176.

The previous prime is 647198785319. The next prime is 647198785369. The reversal of 647198785368 is 863587891746.

647198785368 is a `hidden beast` number, since 6 + 4 + 7 + 1 + 9 + 87 + 8 + 536 + 8 = 666.

647198785368 is digitally balanced in base 2 and base 4, because in such bases 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 (72).

It is a junction number, because it is equal to n+sod(n) for n = 647198785296 and 647198785305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647198785369) 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, 40482423 + ... + 40498406.

Almost surely, 2^647198785368 is an apocalyptic number.

It is an amenable number.

647198785368 is an abundant number, since it is smaller than the sum of its proper divisors (1199164138632).

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

647198785368 is a wasteful number, since it uses less digits than its factorization.

647198785368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80980881 (or 80980871 counting only the distinct ones).

The product of its digits is 487710720, while the sum is 72.

The spelling of 647198785368 in words is "six hundred forty-seven billion, one hundred ninety-eight million, seven hundred eighty-five thousand, three hundred sixty-eight".