72345481823 has 16 divisors (see below), whose sum is σ = 76594533120. Its totient is φ = 68225224704.

The previous prime is 72345481787. The next prime is 72345481919. The reversal of 72345481823 is 32818454327.

It is a cyclic number.

It is not a de Polignac number, because 72345481823 - 2²² = 72341287519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72345483823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237215 + ... + 448287.

It is an arithmetic number, because the mean of its divisors is an integer number (4787158320).

Almost surely, 2^72345481823 is an apocalyptic number.

72345481823 is a deficient number, since it is larger than the sum of its proper divisors (4249051297).

72345481823 is a wasteful number, since it uses less digits than its factorization.

72345481823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211378.

The product of its digits is 1290240, while the sum is 47.

The spelling of 72345481823 in words is "seventy-two billion, three hundred forty-five million, four hundred eighty-one thousand, eight hundred twenty-three".