72894458612 has 6 divisors (see below), whose sum is σ = 127565302578. Its totient is φ = 36447229304.

The previous prime is 72894458603. The next prime is 72894458617. The reversal of 72894458612 is 21685449827.

It can be written as a sum of positive squares in only one way, i.e., 39914445796 + 32980012816 = 199786^2 + 181604^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72894458617) by changing a digit.

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 as a sum of consecutive naturals, namely, 9111807323 + ... + 9111807330.

It is an arithmetic number, because the mean of its divisors is an integer number (21260883763).

Almost surely, 2^72894458612 is an apocalyptic number.

It is an amenable number.

72894458612 is a deficient number, since it is larger than the sum of its proper divisors (54670843966).

72894458612 is a wasteful number, since it uses less digits than its factorization.

72894458612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18223614657 (or 18223614655 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 56.

The spelling of 72894458612 in words is "seventy-two billion, eight hundred ninety-four million, four hundred fifty-eight thousand, six hundred twelve".