72450857278 has 8 divisors (see below), whose sum is σ = 115069008672. Its totient is φ = 34094521056.

The previous prime is 72450857197. The next prime is 72450857291. The reversal of 72450857278 is 87275805427.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065453750 + ... + 1065453817.

It is an arithmetic number, because the mean of its divisors is an integer number (14383626084).

Almost surely, 2^72450857278 is an apocalyptic number.

72450857278 is a deficient number, since it is larger than the sum of its proper divisors (42618151394).

72450857278 is a wasteful number, since it uses less digits than its factorization.

72450857278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130907586.

The product of its (nonzero) digits is 8780800, while the sum is 55.

The spelling of 72450857278 in words is "seventy-two billion, four hundred fifty million, eight hundred fifty-seven thousand, two hundred seventy-eight".