81246616 has 32 divisors (see below), whose sum is σ = 166924800. Its totient is φ = 36766240.

The previous prime is 81246611. The next prime is 81246619. The reversal of 81246616 is 61664218.

It is a super-2 number, since 2×81246616² = 13202025222902912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81246611) 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, 19101 + ... + 22963.

It is an arithmetic number, because the mean of its divisors is an integer number (5216400).

Almost surely, 2^81246616 is an apocalyptic number.

It is an amenable number.

81246616 is an abundant number, since it is smaller than the sum of its proper divisors (85678184).

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

81246616 is a wasteful number, since it uses less digits than its factorization.

81246616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4119 (or 4115 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 81246616 is about 9013.6904761590. The cubic root of 81246616 is about 433.1135395549.

The spelling of 81246616 in words is "eighty-one million, two hundred forty-six thousand, six hundred sixteen".