11868154687 has 4 divisors (see below), whose sum is σ = 11919980920. Its totient is φ = 11816328456.

The previous prime is 11868154681. The next prime is 11868154703. The reversal of 11868154687 is 78645186811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78645186811 = 563 ⋅139689497.

It is a cyclic number.

It is not a de Polignac number, because 11868154687 - 2¹⁵ = 11868121919 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 (11868154681) 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, 25912773 + ... + 25913230.

It is an arithmetic number, because the mean of its divisors is an integer number (2979995230).

Almost surely, 2^11868154687 is an apocalyptic number.

11868154687 is a deficient number, since it is larger than the sum of its proper divisors (51826233).

11868154687 is an equidigital number, since it uses as much as digits as its factorization.

11868154687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51826232.

The product of its digits is 2580480, while the sum is 55.

The spelling of 11868154687 in words is "eleven billion, eight hundred sixty-eight million, one hundred fifty-four thousand, six hundred eighty-seven".