2647888208478 has 24 divisors (see below), whose sum is σ = 5870511843768. Its totient is φ = 862103137392.

The previous prime is 2647888208447. The next prime is 2647888208501. The reversal of 2647888208478 is 8748028887462.

2647888208478 is a `hidden beast` number, since 2 + 6 + 4 + 78 + 8 + 82 + 0 + 8 + 478 = 666.

It is a super-2 number, since 2×2647888208478² (a number of 26 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 11 ways as a sum of consecutive naturals, for example, 1710521325 + ... + 1710522872.

It is an arithmetic number, because the mean of its divisors is an integer number (244604660157).

Almost surely, 2^{2647888208478} is an apocalyptic number.

2647888208478 is an abundant number, since it is smaller than the sum of its proper divisors (3222623635290).

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

2647888208478 is a wasteful number, since it uses less digits than its factorization.

2647888208478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421044248 (or 3421044245 counting only the distinct ones).

The product of its (nonzero) digits is 616562688, while the sum is 72.

The spelling of 2647888208478 in words is "two trillion, six hundred forty-seven billion, eight hundred eighty-eight million, two hundred eight thousand, four hundred seventy-eight".