11971274769 has 16 divisors (see below), whose sum is σ = 17737257600. Its totient is φ = 7979933808.

The previous prime is 11971274747. The next prime is 11971274771. The reversal of 11971274769 is 96747217911.

It is a happy number.

It is not a de Polignac number, because 11971274769 - 2⁵ = 11971274737 is a prime.

It is a super-2 number, since 2×11971274769² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11971274789) 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, 281427 + ... + 321159.

It is an arithmetic number, because the mean of its divisors is an integer number (1108578600).

Almost surely, 2^11971274769 is an apocalyptic number.

It is an amenable number.

11971274769 is a deficient number, since it is larger than the sum of its proper divisors (5765982831).

11971274769 is a wasteful number, since it uses less digits than its factorization.

11971274769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50901 (or 50895 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 54.

It can be divided in two parts, 119712 and 74769, that added together give a 4-th power (194481 = 21⁴).

The spelling of 11971274769 in words is "eleven billion, nine hundred seventy-one million, two hundred seventy-four thousand, seven hundred sixty-nine".