72578728069228 has 12 divisors (see below), whose sum is σ = 127314467174272. Its totient is φ = 36203166019440.

The previous prime is 72578728069213. The next prime is 72578728069231. The reversal of 72578728069228 is 82296082787527.

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, 21549501900 + ... + 21549505267.

Almost surely, 2^{72578728069228} is an apocalyptic number.

It is an amenable number.

72578728069228 is a deficient number, since it is larger than the sum of its proper divisors (54735739105044).

72578728069228 is a wasteful number, since it uses less digits than its factorization.

72578728069228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43099007592 (or 43099007590 counting only the distinct ones).

The product of its (nonzero) digits is 758661120, while the sum is 73.

The spelling of 72578728069228 in words is "seventy-two trillion, five hundred seventy-eight billion, seven hundred twenty-eight million, sixty-nine thousand, two hundred twenty-eight".