11894661807 has 48 divisors (see below), whose sum is σ = 18985118208. Its totient is φ = 6488539200.

The previous prime is 11894661803. The next prime is 11894661871. The reversal of 11894661807 is 70816649811.

It is not a de Polignac number, because 11894661807 - 2² = 11894661803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11894661807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11894661803) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9142057 + ... + 9143357.

It is an arithmetic number, because the mean of its divisors is an integer number (395523296).

Almost surely, 2^11894661807 is an apocalyptic number.

11894661807 is a deficient number, since it is larger than the sum of its proper divisors (7090456401).

11894661807 is a wasteful number, since it uses less digits than its factorization.

11894661807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180 (or 2157 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 51.

The spelling of 11894661807 in words is "eleven billion, eight hundred ninety-four million, six hundred sixty-one thousand, eight hundred seven".