11972257287571 has 96 divisors (see below), whose sum is σ = 15041317948800. Its totient is φ = 9521332531200.

The previous prime is 11972257287499. The next prime is 11972257287593. The reversal of 11972257287571 is 17578275227911.

It is not a de Polignac number, because 11972257287571 - 2²¹ = 11972255190419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11972257287371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1820318635 + ... + 1820325211.

It is an arithmetic number, because the mean of its divisors is an integer number (156680395300).

Almost surely, 2^{11972257287571} is an apocalyptic number.

11972257287571 is a deficient number, since it is larger than the sum of its proper divisors (3069060661229).

11972257287571 is an equidigital number, since it uses as much as digits as its factorization.

11972257287571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6938 (or 6905 counting only the distinct ones).

The product of its digits is 34574400, while the sum is 64.

The spelling of 11972257287571 in words is "eleven trillion, nine hundred seventy-two billion, two hundred fifty-seven million, two hundred eighty-seven thousand, five hundred seventy-one".