81160704 has 200 divisors, whose sum is σ = 257468640. Its totient is φ = 25380864.

The previous prime is 81160699. The next prime is 81160711. The reversal of 81160704 is 40706118.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 787917 + ... + 788019.

Almost surely, 2^81160704 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 81160704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128734320).

81160704 is an abundant number, since it is smaller than the sum of its proper divisors (176307936).

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

81160704 is a wasteful number, since it uses less digits than its factorization.

81160704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 81160704 is about 9008.9235760994. The cubic root of 81160704 is about 432.9608243798.

The spelling of 81160704 in words is "eighty-one million, one hundred sixty thousand, seven hundred four".