11887293478 has 4 divisors (see below), whose sum is σ = 17830940220. Its totient is φ = 5943646738.

The previous prime is 11887293463. The next prime is 11887293487. The reversal of 11887293478 is 87439278811.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2971823368 + ... + 2971823371.

It is an arithmetic number, because the mean of its divisors is an integer number (4457735055).

Almost surely, 2^11887293478 is an apocalyptic number.

11887293478 is a deficient number, since it is larger than the sum of its proper divisors (5943646742).

11887293478 is an equidigital number, since it uses as much as digits as its factorization.

11887293478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5943646741.

The product of its digits is 5419008, while the sum is 58.

The spelling of 11887293478 in words is "eleven billion, eight hundred eighty-seven million, two hundred ninety-three thousand, four hundred seventy-eight".