81452044801 has 8 divisors (see below), whose sum is σ = 86872857480. Its totient is φ = 76101178368.

The previous prime is 81452044777. The next prime is 81452044837. The reversal of 81452044801 is 10844025418.

It can be written as a sum of positive squares in 4 ways, for example, as 5151794176 + 76300250625 = 71776^2 + 276225^2 .

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

It is not a de Polignac number, because 81452044801 - 2⁵ = 81452044769 is a prime.

It is a super-2 number, since 2×81452044801² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81452014801) 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, 17484156 + ... + 17488813.

It is an arithmetic number, because the mean of its divisors is an integer number (10859107185).

Almost surely, 2^81452044801 is an apocalyptic number.

It is an amenable number.

81452044801 is a deficient number, since it is larger than the sum of its proper divisors (5420812679).

81452044801 is a wasteful number, since it uses less digits than its factorization.

81452044801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34973123.

The product of its (nonzero) digits is 40960, while the sum is 37.

The spelling of 81452044801 in words is "eighty-one billion, four hundred fifty-two million, forty-four thousand, eight hundred one".