11997427115443 has 8 divisors (see below), whose sum is σ = 14957831208960. Its totient is φ = 9348644505480.

The previous prime is 11997427115423. The next prime is 11997427115503. The reversal of 11997427115443 is 34451172479911.

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

It is a de Polignac number, because none of the positive numbers 2^k-11997427115443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11997427115423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77905370803 + ... + 77905370956.

It is an arithmetic number, because the mean of its divisors is an integer number (1869728901120).

Almost surely, 2^{11997427115443} is an apocalyptic number.

11997427115443 is a deficient number, since it is larger than the sum of its proper divisors (2960404093517).

11997427115443 is a wasteful number, since it uses less digits than its factorization.

11997427115443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155810741777.

The product of its digits is 7620480, while the sum is 58.

The spelling of 11997427115443 in words is "eleven trillion, nine hundred ninety-seven billion, four hundred twenty-seven million, one hundred fifteen thousand, four hundred forty-three".