72215715858 has 48 divisors (see below), whose sum is σ = 170967171648. Its totient is φ = 20200197600.

The previous prime is 72215715839. The next prime is 72215715863. The reversal of 72215715858 is 85851751227.

It is a self number, because there is not a number n which added to its sum of digits gives 72215715858.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3816358 + ... + 3835233.

It is an arithmetic number, because the mean of its divisors is an integer number (3561816076).

Almost surely, 2^72215715858 is an apocalyptic number.

72215715858 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

72215715858 is an abundant number, since it is smaller than the sum of its proper divisors (98751455790).

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

72215715858 is a wasteful number, since it uses less digits than its factorization.

72215715858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7651631 (or 7651620 counting only the distinct ones).

The product of its digits is 1568000, while the sum is 51.

The spelling of 72215715858 in words is "seventy-two billion, two hundred fifteen million, seven hundred fifteen thousand, eight hundred fifty-eight".