2661105289758 has 16 divisors (see below), whose sum is σ = 5322227196816. Its totient is φ = 887032327040.

The previous prime is 2661105289753. The next prime is 2661105289769. The reversal of 2661105289758 is 8579825011662.

2661105289758 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661105289753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2576860 + ... + 3458672.

It is an arithmetic number, because the mean of its divisors is an integer number (332639199801).

Almost surely, 2^{2661105289758} is an apocalyptic number.

2661105289758 is an abundant number, since it is smaller than the sum of its proper divisors (2661121907058).

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

2661105289758 is a wasteful number, since it uses less digits than its factorization.

2661105289758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384779.

The product of its (nonzero) digits is 14515200, while the sum is 60.

The spelling of 2661105289758 in words is "two trillion, six hundred sixty-one billion, one hundred five million, two hundred eighty-nine thousand, seven hundred fifty-eight".