72471218428 has 24 divisors (see below), whose sum is σ = 149940453600. Its totient is φ = 29988090048.

The previous prime is 72471218419. The next prime is 72471218431. The reversal of 72471218428 is 82481217427.

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, 44624323 + ... + 44625946.

It is an arithmetic number, because the mean of its divisors is an integer number (6247518900).

Almost surely, 2^72471218428 is an apocalyptic number.

It is an amenable number.

72471218428 is an abundant number, since it is smaller than the sum of its proper divisors (77469235172).

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

72471218428 is a wasteful number, since it uses less digits than its factorization.

72471218428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89250309 (or 89250307 counting only the distinct ones).

The product of its digits is 401408, while the sum is 46.

The spelling of 72471218428 in words is "seventy-two billion, four hundred seventy-one million, two hundred eighteen thousand, four hundred twenty-eight".