81453194027 has 8 divisors (see below), whose sum is σ = 82250304864. Its totient is φ = 80656204608.

The previous prime is 81453193907. The next prime is 81453194057. The reversal of 81453194027 is 72049135418.

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 81453194027 - 2⁸ = 81453193771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81453194057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1937543 + ... + 1979135.

It is an arithmetic number, because the mean of its divisors is an integer number (10281288108).

Almost surely, 2^81453194027 is an apocalyptic number.

81453194027 is a deficient number, since it is larger than the sum of its proper divisors (797110837).

81453194027 is a wasteful number, since it uses less digits than its factorization.

81453194027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60709.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 81453194027 in words is "eighty-one billion, four hundred fifty-three million, one hundred ninety-four thousand, twenty-seven".