81485951323 has 8 divisors (see below), whose sum is σ = 94030946048. Its totient is φ = 69166992744.

The previous prime is 81485951303. The next prime is 81485951341. The reversal of 81485951323 is 32315958418.

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 81485951323 - 2⁵ = 81485951291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81485951303) 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, 56508261 + ... + 56509702.

It is an arithmetic number, because the mean of its divisors is an integer number (11753868256).

Almost surely, 2^81485951323 is an apocalyptic number.

81485951323 is a deficient number, since it is larger than the sum of its proper divisors (12544994725).

81485951323 is a wasteful number, since it uses less digits than its factorization.

81485951323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113018073.

The product of its digits is 1036800, while the sum is 49.

The spelling of 81485951323 in words is "eighty-one billion, four hundred eighty-five million, nine hundred fifty-one thousand, three hundred twenty-three".