10971385867581 has 8 divisors (see below), whose sum is σ = 14628840406560. Its totient is φ = 7314094286832.

The previous prime is 10971385867553. The next prime is 10971385867583. The reversal of 10971385867581 is 18576858317901.

It is a happy number.

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

It is not a de Polignac number, because 10971385867581 - 2⁶ = 10971385867517 is a prime.

It is a super-2 number, since 2×10971385867581² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10971385867583) 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, 40582375 + ... + 40851828.

It is an arithmetic number, because the mean of its divisors is an integer number (1828605050820).

Almost surely, 2^{10971385867581} is an apocalyptic number.

It is an amenable number.

10971385867581 is a deficient number, since it is larger than the sum of its proper divisors (3657454538979).

10971385867581 is an equidigital number, since it uses as much as digits as its factorization.

10971385867581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81479115.

The product of its (nonzero) digits is 101606400, while the sum is 69.

The spelling of 10971385867581 in words is "ten trillion, nine hundred seventy-one billion, three hundred eighty-five million, eight hundred sixty-seven thousand, five hundred eighty-one".