81200897899199 has 8 divisors (see below), whose sum is σ = 87448469323152. Its totient is φ = 74953519119360.

The previous prime is 81200897899153. The next prime is 81200897899207. The reversal of 81200897899199 is 99199879800218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81200897899199 - 2³² = 81196602931903 is a prime.

It is a super-2 number, since 2×81200897899199² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81200897299199) 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, 47284994 + ... + 48972159.

It is an arithmetic number, because the mean of its divisors is an integer number (10931058665394).

Almost surely, 2^{81200897899199} is an apocalyptic number.

81200897899199 is a deficient number, since it is larger than the sum of its proper divisors (6247571423953).

81200897899199 is a wasteful number, since it uses less digits than its factorization.

81200897899199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96322057.

The product of its (nonzero) digits is 423263232, while the sum is 80.

The spelling of 81200897899199 in words is "eighty-one trillion, two hundred billion, eight hundred ninety-seven million, eight hundred ninety-nine thousand, one hundred ninety-nine".