1081505417887 has 4 divisors (see below), whose sum is σ = 1082180938176. Its totient is φ = 1080829897600.

The previous prime is 1081505417873. The next prime is 1081505417891. The reversal of 1081505417887 is 7887145051801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1081505417887 - 2¹⁵ = 1081505385119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081505417807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337757743 + ... + 337760944.

It is an arithmetic number, because the mean of its divisors is an integer number (270545234544).

Almost surely, 2^{1081505417887} is an apocalyptic number.

1081505417887 is a deficient number, since it is larger than the sum of its proper divisors (675520289).

1081505417887 is an equidigital number, since it uses as much as digits as its factorization.

1081505417887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675520288.

The product of its (nonzero) digits is 2508800, while the sum is 55.

The spelling of 1081505417887 in words is "one trillion, eighty-one billion, five hundred five million, four hundred seventeen thousand, eight hundred eighty-seven".