11687273691 has 8 divisors (see below), whose sum is σ = 15588489744. Its totient is φ = 7788786720.

The previous prime is 11687273621. The next prime is 11687273693. The reversal of 11687273691 is 19637278611.

It is a happy number.

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

It is not a de Polignac number, because 11687273691 - 2²³ = 11678885083 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (11687273693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672256 + ... + 689421.

It is an arithmetic number, because the mean of its divisors is an integer number (1948561218).

Almost surely, 2^11687273691 is an apocalyptic number.

11687273691 is a deficient number, since it is larger than the sum of its proper divisors (3901216053).

11687273691 is a wasteful number, since it uses less digits than its factorization.

11687273691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364541.

The product of its digits is 762048, while the sum is 51.

The spelling of 11687273691 in words is "eleven billion, six hundred eighty-seven million, two hundred seventy-three thousand, six hundred ninety-one".