2168657854587 has 36 divisors (see below), whose sum is σ = 3737461857960. Its totient is φ = 1239202451592.

The previous prime is 2168657854567. The next prime is 2168657854661. The reversal of 2168657854587 is 7854587568612.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

2168657854587 is a `hidden beast` number, since 2 + 1 + 6 + 8 + 6 + 5 + 78 + 545 + 8 + 7 = 666.

It is not a de Polignac number, because 2168657854587 - 2¹⁹ = 2168657330299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2168657854567) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 53544058 + ... + 53584544.

Almost surely, 2^{2168657854587} is an apocalyptic number.

2168657854587 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2168657854587 is a deficient number, since it is larger than the sum of its proper divisors (1568804003373).

2168657854587 is an frugal number, since it uses more digits than its factorization.

2168657854587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80997 (or 40497 counting only the distinct ones).

The product of its digits is 903168000, while the sum is 72.

The spelling of 2168657854587 in words is "two trillion, one hundred sixty-eight billion, six hundred fifty-seven million, eight hundred fifty-four thousand, five hundred eighty-seven".