11971647902 has 8 divisors (see below), whose sum is σ = 17966407512. Its totient is φ = 5982845400.

The previous prime is 11971647893. The next prime is 11971647917. The reversal of 11971647902 is 20974617911.

It is a happy number.

11971647902 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×11971647902² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1484249 + ... + 1492292.

It is an arithmetic number, because the mean of its divisors is an integer number (2245800939).

Almost surely, 2^11971647902 is an apocalyptic number.

11971647902 is a deficient number, since it is larger than the sum of its proper divisors (5994759610).

11971647902 is a wasteful number, since it uses less digits than its factorization.

11971647902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2978554.

The product of its (nonzero) digits is 190512, while the sum is 47.

The spelling of 11971647902 in words is "eleven billion, nine hundred seventy-one million, six hundred forty-seven thousand, nine hundred two".