81140702 has 16 divisors (see below), whose sum is σ = 125857152. Its totient is φ = 39192960.

The previous prime is 81140701. The next prime is 81140713. The reversal of 81140702 is 20704118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81140701) 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, 67418 + ... + 68610.

It is an arithmetic number, because the mean of its divisors is an integer number (7866072).

Almost surely, 2^81140702 is an apocalyptic number.

81140702 is a deficient number, since it is larger than the sum of its proper divisors (44716450).

81140702 is a wasteful number, since it uses less digits than its factorization.

81140702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 81140702 is about 9007.8133861665. The cubic root of 81140702 is about 432.9252538245.

The spelling of 81140702 in words is "eighty-one million, one hundred forty thousand, seven hundred two".