81261298714 has 16 divisors (see below), whose sum is σ = 124832606976. Its totient is φ = 39661762000.

The previous prime is 81261298709. The next prime is 81261298717. The reversal of 81261298714 is 41789216218.

It is not an unprimeable number, because it can be changed into a prime (81261298717) 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, 2818642 + ... + 2847325.

It is an arithmetic number, because the mean of its divisors is an integer number (7802037936).

Almost surely, 2^81261298714 is an apocalyptic number.

81261298714 is a deficient number, since it is larger than the sum of its proper divisors (43571308262).

81261298714 is a wasteful number, since it uses less digits than its factorization.

81261298714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5666141.

The product of its digits is 387072, while the sum is 49.

The spelling of 81261298714 in words is "eighty-one billion, two hundred sixty-one million, two hundred ninety-eight thousand, seven hundred fourteen".