2581122471768 has 64 divisors (see below), whose sum is σ = 7258300552800. Its totient is φ = 860374151424.

The previous prime is 2581122471751. The next prime is 2581122471769. The reversal of 2581122471768 is 8671742211852.

2581122471768 is a `hidden beast` number, since 2 + 5 + 81 + 1 + 22 + 471 + 76 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581122471769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73745721 + ... + 73780712.

Almost surely, 2^{2581122471768} is an apocalyptic number.

It is an amenable number.

2581122471768 is an abundant number, since it is smaller than the sum of its proper divisors (4677178081032).

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

2581122471768 is an equidigital number, since it uses as much as digits as its factorization.

2581122471768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147526460 (or 147526438 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 54.

The spelling of 2581122471768 in words is "two trillion, five hundred eighty-one billion, one hundred twenty-two million, four hundred seventy-one thousand, seven hundred sixty-eight".