2533178643864 has 64 divisors (see below), whose sum is σ = 7095389840640. Its totient is φ = 746883135360.

The previous prime is 2533178643829. The next prime is 2533178643869. The reversal of 2533178643864 is 4683468713352.

It is a happy number.

2533178643864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2533178643798 and 2533178643807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2533178643869) 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, 129657444 + ... + 129676979.

It is an arithmetic number, because the mean of its divisors is an integer number (110865466260).

Almost surely, 2^{2533178643864} is an apocalyptic number.

2533178643864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2533178643864 is an abundant number, since it is smaller than the sum of its proper divisors (4562211196776).

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

2533178643864 is a wasteful number, since it uses less digits than its factorization.

2533178643864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259334480 (or 259334476 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 60.

The spelling of 2533178643864 in words is "two trillion, five hundred thirty-three billion, one hundred seventy-eight million, six hundred forty-three thousand, eight hundred sixty-four".