72240197908506 has 8 divisors (see below), whose sum is σ = 144480395817024. Its totient is φ = 24080065969500.

The previous prime is 72240197908421. The next prime is 72240197908523. The reversal of 72240197908506 is 60580979104227.

It is a sphenic number, since it is the product of 3 distinct primes.

72240197908506 is an admirable number.

It is a super-2 number, since 2×72240197908506² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72240197908506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6020016492370 + ... + 6020016492381.

It is an arithmetic number, because the mean of its divisors is an integer number (18060049477128).

Almost surely, 2^{72240197908506} is an apocalyptic number.

72240197908506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

72240197908506 is a wasteful number, since it uses less digits than its factorization.

72240197908506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12040032984756.

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 72240197908506 in words is "seventy-two trillion, two hundred forty billion, one hundred ninety-seven million, nine hundred eight thousand, five hundred six".