11898749971 has 16 divisors (see below), whose sum is σ = 12218947200. Its totient is φ = 11581554688.

The previous prime is 11898749959. The next prime is 11898749987. The reversal of 11898749971 is 17994789811.

It is a cyclic number.

It is not a de Polignac number, because 11898749971 - 2¹⁵ = 11898717203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11898749911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8444115 + ... + 8445523.

It is an arithmetic number, because the mean of its divisors is an integer number (763684200).

Almost surely, 2^11898749971 is an apocalyptic number.

11898749971 is a deficient number, since it is larger than the sum of its proper divisors (320197229).

11898749971 is a wasteful number, since it uses less digits than its factorization.

11898749971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318.

The product of its digits is 9144576, while the sum is 64.

The spelling of 11898749971 in words is "eleven billion, eight hundred ninety-eight million, seven hundred forty-nine thousand, nine hundred seventy-one".