72681739479028 has 24 divisors (see below), whose sum is σ = 131368158254088. Its totient is φ = 35166765643776.

The previous prime is 72681739479017. The next prime is 72681739479047. The reversal of 72681739479028 is 82097493718627.

It can be written as a sum of positive squares in 4 ways, for example, as 36442447150564 + 36239292328464 = 6036758^2 + 6019908^2 .

It is a Harshad number since it is a multiple of its sum of digits (73).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2348192701 + ... + 2348223652.

It is an arithmetic number, because the mean of its divisors is an integer number (5473673260587).

Almost surely, 2^{72681739479028} is an apocalyptic number.

It is an amenable number.

72681739479028 is a deficient number, since it is larger than the sum of its proper divisors (58686418775060).

72681739479028 is a wasteful number, since it uses less digits than its factorization.

72681739479028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4696416483 (or 4696416481 counting only the distinct ones).

The product of its (nonzero) digits is 512096256, while the sum is 73.

The spelling of 72681739479028 in words is "seventy-two trillion, six hundred eighty-one billion, seven hundred thirty-nine million, four hundred seventy-nine thousand, twenty-eight".