81560696 has 48 divisors (see below), whose sum is σ = 188373600. Its totient is φ = 32895744.

The previous prime is 81560671. The next prime is 81560701. The reversal of 81560696 is 69606518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 545 + ... + 12783.

It is an arithmetic number, because the mean of its divisors is an integer number (3924450).

Almost surely, 2^81560696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81560696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94186800).

81560696 is an abundant number, since it is smaller than the sum of its proper divisors (106812904).

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

81560696 is a wasteful number, since it uses less digits than its factorization.

81560696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12276 (or 12265 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 81560696 is about 9031.0960575115. The cubic root of 81560696 is about 433.6709264067.

The spelling of 81560696 in words is "eighty-one million, five hundred sixty thousand, six hundred ninety-six".