72443470520 has 32 divisors (see below), whose sum is σ = 163309515120. Its totient is φ = 28921973760.

The previous prime is 72443470513. The next prime is 72443470537. The reversal of 72443470520 is 2507434427.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1710521 + ... + 1752360.

Almost surely, 2^72443470520 is an apocalyptic number.

It is an amenable number.

72443470520 is an abundant number, since it is smaller than the sum of its proper divisors (90866044600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72443470520 is a wasteful number, since it uses less digits than its factorization.

72443470520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463415 (or 3463411 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 38.

The spelling of 72443470520 in words is "seventy-two billion, four hundred forty-three million, four hundred seventy thousand, five hundred twenty".