81022747431401 has 8 divisors (see below), whose sum is σ = 85964949089280. Its totient is φ = 76100118850368.

The previous prime is 81022747431397. The next prime is 81022747431467. The reversal of 81022747431401 is 10413474722018.

It is a happy number.

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 81022747431401 - 2² = 81022747431397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81022747431491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4893260681 + ... + 4893277238.

It is an arithmetic number, because the mean of its divisors is an integer number (10745618636160).

Almost surely, 2^{81022747431401} is an apocalyptic number.

It is an amenable number.

81022747431401 is a deficient number, since it is larger than the sum of its proper divisors (4942201657879).

81022747431401 is a wasteful number, since it uses less digits than its factorization.

81022747431401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9786538423.

The product of its (nonzero) digits is 301056, while the sum is 44.

The spelling of 81022747431401 in words is "eighty-one trillion, twenty-two billion, seven hundred forty-seven million, four hundred thirty-one thousand, four hundred one".