72191882257 has 8 divisors (see below), whose sum is σ = 78846048000. Its totient is φ = 65552927760.

The previous prime is 72191882249. The next prime is 72191882281. The reversal of 72191882257 is 75228819127.

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

It is a cyclic number.

It is not a de Polignac number, because 72191882257 - 2³ = 72191882249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72191882227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3792882 + ... + 3811867.

It is an arithmetic number, because the mean of its divisors is an integer number (9855756000).

Almost surely, 2^72191882257 is an apocalyptic number.

It is an amenable number.

72191882257 is a deficient number, since it is larger than the sum of its proper divisors (6654165743).

72191882257 is a wasteful number, since it uses less digits than its factorization.

72191882257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7605623.

The product of its digits is 1128960, while the sum is 52.

The spelling of 72191882257 in words is "seventy-two billion, one hundred ninety-one million, eight hundred eighty-two thousand, two hundred fifty-seven".