81195174 has 24 divisors (see below), whose sum is σ = 178403472. Its totient is φ = 26683440.

The previous prime is 81195167. The next prime is 81195193. The reversal of 81195174 is 47159118.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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, 30489 + ... + 33044.

It is an arithmetic number, because the mean of its divisors is an integer number (7433478).

Almost surely, 2^81195174 is an apocalyptic number.

81195174 is an abundant number, since it is smaller than the sum of its proper divisors (97208298).

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

81195174 is a wasteful number, since it uses less digits than its factorization.

81195174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63612 (or 63609 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 81195174 is about 9010.8364761547. The cubic root of 81195174 is about 433.0221103904.

The spelling of 81195174 in words is "eighty-one million, one hundred ninety-five thousand, one hundred seventy-four".