81160950 has 48 divisors (see below), whose sum is σ = 216767376. Its totient is φ = 19977600.

The previous prime is 81160841. The next prime is 81160957. The reversal of 81160950 is 5906118.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81160957) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18861 + ... + 22760.

It is an arithmetic number, because the mean of its divisors is an integer number (4515987).

Almost surely, 2^81160950 is an apocalyptic number.

81160950 is an abundant number, since it is smaller than the sum of its proper divisors (135606426).

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

81160950 is a wasteful number, since it uses less digits than its factorization.

81160950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41649 (or 41644 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 81160950 is about 9008.9372292185. The cubic root of 81160950 is about 432.9612618175.

The spelling of 81160950 in words is "eighty-one million, one hundred sixty thousand, nine hundred fifty".