2591131771860 has 48 divisors (see below), whose sum is σ = 7255244685696. Its totient is φ = 690961260672.

The previous prime is 2591131771841. The next prime is 2591131771897. The reversal of 2591131771860 is 681771311952.

It is a congruent number.

It is an unprimeable number.

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, 8133129 + ... + 8445711.

It is an arithmetic number, because the mean of its divisors is an integer number (151150930952).

Almost surely, 2^{2591131771860} is an apocalyptic number.

2591131771860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2591131771860 is an abundant number, since it is smaller than the sum of its proper divisors (4664112913836).

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

2591131771860 is a wasteful number, since it uses less digits than its factorization.

2591131771860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450752 (or 450750 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 51.

The spelling of 2591131771860 in words is "two trillion, five hundred ninety-one billion, one hundred thirty-one million, seven hundred seventy-one thousand, eight hundred sixty".