64147618647 has 12 divisors (see below), whose sum is σ = 105894481680. Its totient is φ = 36655782048.

The previous prime is 64147618643. The next prime is 64147618657. The reversal of 64147618647 is 74681674146.

It is a happy number.

64147618647 is a `hidden beast` number, since 6 + 4 + 14 + 7 + 618 + 6 + 4 + 7 = 666.

It is not a de Polignac number, because 64147618647 - 2² = 64147618643 is a prime.

It is a super-2 number, since 2×64147618647² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64147618593 and 64147618602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64147618643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 509108022 + ... + 509108147.

It is an arithmetic number, because the mean of its divisors is an integer number (8824540140).

Almost surely, 2^64147618647 is an apocalyptic number.

64147618647 is a deficient number, since it is larger than the sum of its proper divisors (41746863033).

64147618647 is a wasteful number, since it uses less digits than its factorization.

64147618647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018216182 (or 1018216179 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The spelling of 64147618647 in words is "sixty-four billion, one hundred forty-seven million, six hundred eighteen thousand, six hundred forty-seven".