81678410898 has 16 divisors (see below), whose sum is σ = 186693510720. Its totient is φ = 23336688816.

The previous prime is 81678410897. The next prime is 81678410899. The reversal of 81678410898 is 89801487618.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (81678410897) and next prime (81678410899).

It is not an unprimeable number, because it can be changed into a prime (81678410897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 972361993 + ... + 972362076.

It is an arithmetic number, because the mean of its divisors is an integer number (11668344420).

Almost surely, 2^81678410898 is an apocalyptic number.

81678410898 is an abundant number, since it is smaller than the sum of its proper divisors (105015099822).

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

81678410898 is a wasteful number, since it uses less digits than its factorization.

81678410898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944724081.

The product of its (nonzero) digits is 6193152, while the sum is 60.

The spelling of 81678410898 in words is "eighty-one billion, six hundred seventy-eight million, four hundred ten thousand, eight hundred ninety-eight".