2555664335664 has 120 divisors (see below), whose sum is σ = 7402247350848. Its totient is φ = 753512613120.

The previous prime is 2555664335657. The next prime is 2555664335681. The reversal of 2555664335664 is 4665334665552.

It is a junction number, because it is equal to n+sod(n) for n = 2555664335598 and 2555664335607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1044982 + ... + 2490645.

Almost surely, 2^{2555664335664} is an apocalyptic number.

2555664335664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2555664335664 is an abundant number, since it is smaller than the sum of its proper divisors (4846583015184).

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

2555664335664 is a wasteful number, since it uses less digits than its factorization.

2555664335664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3535723 (or 3535680 counting only the distinct ones).

The product of its digits is 233280000, while the sum is 60.

The spelling of 2555664335664 in words is "two trillion, five hundred fifty-five billion, six hundred sixty-four million, three hundred thirty-five thousand, six hundred sixty-four".