81347035998 has 32 divisors (see below), whose sum is σ = 167089806720. Its totient is φ = 26392157600.

The previous prime is 81347035997. The next prime is 81347036053. The reversal of 81347035998 is 89953074318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81347035997) 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, 1101840 + ... + 1173347.

It is an arithmetic number, because the mean of its divisors is an integer number (5221556460).

Almost surely, 2^81347035998 is an apocalyptic number.

81347035998 is an abundant number, since it is smaller than the sum of its proper divisors (85742770722).

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

81347035998 is a wasteful number, since it uses less digits than its factorization.

81347035998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275352.

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 81347035998 in words is "eighty-one billion, three hundred forty-seven million, thirty-five thousand, nine hundred ninety-eight".