81695941092 has 48 divisors (see below), whose sum is σ = 212444276800. Its totient is φ = 27149696640.

The previous prime is 81695941091. The next prime is 81695941099. The reversal of 81695941092 is 29014959618.

81695941092 is a `hidden beast` number, since 81 + 69 + 5 + 9 + 410 + 92 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (81695941091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1106917 + ... + 1178412.

Almost surely, 2^81695941092 is an apocalyptic number.

It is an amenable number.

81695941092 is an abundant number, since it is smaller than the sum of its proper divisors (130748335708).

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

81695941092 is a wasteful number, since it uses less digits than its factorization.

81695941092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285673 (or 2285665 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The spelling of 81695941092 in words is "eighty-one billion, six hundred ninety-five million, nine hundred forty-one thousand, ninety-two".