11537721044771 has 4 divisors (see below), whose sum is σ = 11709925836552. Its totient is φ = 11365516252992.

The previous prime is 11537721044743. The next prime is 11537721044849. The reversal of 11537721044771 is 17744012773511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11537721044771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11537721040771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86102395790 + ... + 86102395923.

It is an arithmetic number, because the mean of its divisors is an integer number (2927481459138).

Almost surely, 2^{11537721044771} is an apocalyptic number.

11537721044771 is a deficient number, since it is larger than the sum of its proper divisors (172204791781).

11537721044771 is an equidigital number, since it uses as much as digits as its factorization.

11537721044771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172204791780.

The product of its (nonzero) digits is 1152480, while the sum is 50.

The spelling of 11537721044771 in words is "eleven trillion, five hundred thirty-seven billion, seven hundred twenty-one million, forty-four thousand, seven hundred seventy-one".