81377714 has 16 divisors (see below), whose sum is σ = 133703136. Its totient is φ = 36840000.

The previous prime is 81377713. The next prime is 81377729. The reversal of 81377714 is 41777318.

It is not an unprimeable number, because it can be changed into a prime (81377713) 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, 1847 + ... + 12890.

It is an arithmetic number, because the mean of its divisors is an integer number (8356446).

Almost surely, 2^81377714 is an apocalyptic number.

81377714 is a deficient number, since it is larger than the sum of its proper divisors (52325422).

81377714 is a wasteful number, since it uses less digits than its factorization.

81377714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15001.

The product of its digits is 32928, while the sum is 38.

The square root of 81377714 is about 9020.9597050425. The cubic root of 81377714 is about 433.3463689701.

It can be divided in two parts, 8137 and 7714, that added together give a palindrome (15851).

The spelling of 81377714 in words is "eighty-one million, three hundred seventy-seven thousand, seven hundred fourteen".