81095298678 has 12 divisors (see below), whose sum is σ = 175706480508. Its totient is φ = 27031766220.

The previous prime is 81095298677. The next prime is 81095298703. The reversal of 81095298678 is 87689259018.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81095298677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2252647168 + ... + 2252647203.

It is an arithmetic number, because the mean of its divisors is an integer number (14642206709).

Almost surely, 2^81095298678 is an apocalyptic number.

81095298678 is an abundant number, since it is smaller than the sum of its proper divisors (94611181830).

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

81095298678 is a wasteful number, since it uses less digits than its factorization.

81095298678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4505294379 (or 4505294376 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 63.

The spelling of 81095298678 in words is "eighty-one billion, ninety-five million, two hundred ninety-eight thousand, six hundred seventy-eight".