11787894007 has 4 divisors (see below), whose sum is σ = 11788115560. Its totient is φ = 11787672456.

The previous prime is 11787893989. The next prime is 11787894011. The reversal of 11787894007 is 70049878711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70049878711 = 29 ⋅2415513059.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11787894007 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 (11787894407) 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, 22408 + ... + 155170.

It is an arithmetic number, because the mean of its divisors is an integer number (2947028890).

Almost surely, 2^11787894007 is an apocalyptic number.

11787894007 is a deficient number, since it is larger than the sum of its proper divisors (221553).

11787894007 is an equidigital number, since it uses as much as digits as its factorization.

11787894007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221552.

The product of its (nonzero) digits is 790272, while the sum is 52.

The spelling of 11787894007 in words is "eleven billion, seven hundred eighty-seven million, eight hundred ninety-four thousand, seven".