81576914 has 16 divisors (see below), whose sum is σ = 130118400. Its totient is φ = 38224704.

The previous prime is 81576889. The next prime is 81576919. The reversal of 81576914 is 41967518.

It is not an unprimeable number, because it can be changed into a prime (81576919) 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, 3107 + ... + 13145.

It is an arithmetic number, because the mean of its divisors is an integer number (8132400).

Almost surely, 2^81576914 is an apocalyptic number.

81576914 is a deficient number, since it is larger than the sum of its proper divisors (48541486).

81576914 is a wasteful number, since it uses less digits than its factorization.

81576914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10297.

The product of its digits is 60480, while the sum is 41.

The square root of 81576914 is about 9031.9939105382. The cubic root of 81576914 is about 433.6996690459.

The spelling of 81576914 in words is "eighty-one million, five hundred seventy-six thousand, nine hundred fourteen".