1087447981065 has 8 divisors (see below), whose sum is σ = 1739916769728. Its totient is φ = 579972256560.

The previous prime is 1087447981051. The next prime is 1087447981097. The reversal of 1087447981065 is 5601897447801.

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

It is not a de Polignac number, because 1087447981065 - 2³⁵ = 1053088242697 is a prime.

It is a super-2 number, since 2×1087447981065² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36248266021 + ... + 36248266050.

It is an arithmetic number, because the mean of its divisors is an integer number (217489596216).

Almost surely, 2^{1087447981065} is an apocalyptic number.

1087447981065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1087447981065 is a deficient number, since it is larger than the sum of its proper divisors (652468788663).

1087447981065 is an equidigital number, since it uses as much as digits as its factorization.

1087447981065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72496532079.

The product of its (nonzero) digits is 13547520, while the sum is 60.

The spelling of 1087447981065 in words is "one trillion, eighty-seven billion, four hundred forty-seven million, nine hundred eighty-one thousand, sixty-five".