81076512 has 48 divisors (see below), whose sum is σ = 232176672. Its totient is φ = 24568320.

The previous prime is 81076507. The next prime is 81076517. The reversal of 81076512 is 21567018.

It is an interprime number because it is at equal distance from previous prime (81076507) and next prime (81076517).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×81076512² = 13146801596172288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81076512.

It is not an unprimeable number, because it can be changed into a prime (81076517) 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, 37333 + ... + 39444.

It is an arithmetic number, because the mean of its divisors is an integer number (4837014).

Almost surely, 2^81076512 is an apocalyptic number.

It is an amenable number.

81076512 is an abundant number, since it is smaller than the sum of its proper divisors (151100160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81076512 is a wasteful number, since it uses less digits than its factorization.

81076512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76801 (or 76793 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 81076512 is about 9004.2496633534. The cubic root of 81076512 is about 432.8110620456.

The spelling of 81076512 in words is "eighty-one million, seventy-six thousand, five hundred twelve".