1087854206691 has 24 divisors (see below), whose sum is σ = 1786536084240. Its totient is φ = 585064445952.

The previous prime is 1087854206651. The next prime is 1087854206711. The reversal of 1087854206691 is 1966024587801.

It is not a de Polignac number, because 1087854206691 - 2¹⁹ = 1087853682403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1087854206651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 217655406 + ... + 217660403.

It is an arithmetic number, because the mean of its divisors is an integer number (74439003510).

Almost surely, 2^{1087854206691} is an apocalyptic number.

1087854206691 is a deficient number, since it is larger than the sum of its proper divisors (698681877549).

1087854206691 is a wasteful number, since it uses less digits than its factorization.

1087854206691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435315843 (or 435315836 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 57.

The spelling of 1087854206691 in words is "one trillion, eighty-seven billion, eight hundred fifty-four million, two hundred six thousand, six hundred ninety-one".