1087787505081 has 8 divisors (see below), whose sum is σ = 1450388625280. Its totient is φ = 725189027472.

The previous prime is 1087787505073. The next prime is 1087787505109. The reversal of 1087787505081 is 1805057877801.

It is a happy number.

1087787505081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1087787505081 - 2³ = 1087787505073 is a prime.

It is a super-2 number, since 2×1087787505081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1087787505061) 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, 700431 + ... + 1632843.

It is an arithmetic number, because the mean of its divisors is an integer number (181298578160).

Almost surely, 2^{1087787505081} is an apocalyptic number.

It is an amenable number.

1087787505081 is a deficient number, since it is larger than the sum of its proper divisors (362601120199).

1087787505081 is an equidigital number, since it uses as much as digits as its factorization.

1087787505081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321295.

The product of its (nonzero) digits is 4390400, while the sum is 57.

The spelling of 1087787505081 in words is "one trillion, eighty-seven billion, seven hundred eighty-seven million, five hundred five thousand, eighty-one".