81510676 has 12 divisors (see below), whose sum is σ = 153616372. Its totient is φ = 37620288.

The previous prime is 81510641. The next prime is 81510679. The reversal of 81510676 is 67601518.

It can be written as a sum of positive squares in 2 ways, for example, as 56250000 + 25260676 = 7500^2 + 5026^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81510679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783705 + ... + 783808.

Almost surely, 2^81510676 is an apocalyptic number.

It is an amenable number.

81510676 is a deficient number, since it is larger than the sum of its proper divisors (72105696).

81510676 is a wasteful number, since it uses less digits than its factorization.

81510676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567530 (or 1567528 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 81510676 is about 9028.3263122242. The cubic root of 81510676 is about 433.5822535662.

The spelling of 81510676 in words is "eighty-one million, five hundred ten thousand, six hundred seventy-six".