81596016 has 30 divisors (see below), whose sum is σ = 228355920. Its totient is φ = 27198624.

The previous prime is 81596003. The next prime is 81596029. The reversal of 81596016 is 61069518.

It is an interprime number because it is at equal distance from previous prime (81596003) and next prime (81596029).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 283176 + ... + 283463.

It is an arithmetic number, because the mean of its divisors is an integer number (7611864).

Almost surely, 2^81596016 is an apocalyptic number.

It is an amenable number.

81596016 is an abundant number, since it is smaller than the sum of its proper divisors (146759904).

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

81596016 is a wasteful number, since it uses less digits than its factorization.

81596016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566653 (or 566644 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 81596016 is about 9033.0513117108. The cubic root of 81596016 is about 433.7335180199.

The spelling of 81596016 in words is "eighty-one million, five hundred ninety-six thousand, sixteen".