72478440326 has 32 divisors (see below), whose sum is σ = 116709672960. Its totient is φ = 33652116576.

The previous prime is 72478440323. The next prime is 72478440337. The reversal of 72478440326 is 62304487427.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72478440323) 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, 2172665 + ... + 2205771.

It is an arithmetic number, because the mean of its divisors is an integer number (3647177280).

Almost surely, 2^72478440326 is an apocalyptic number.

72478440326 is a deficient number, since it is larger than the sum of its proper divisors (44231232634).

72478440326 is a wasteful number, since it uses less digits than its factorization.

72478440326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34268.

The product of its (nonzero) digits is 1806336, while the sum is 47.

The spelling of 72478440326 in words is "seventy-two billion, four hundred seventy-eight million, four hundred forty thousand, three hundred twenty-six".