72708049957 has 2 divisors, whose sum is σ = 72708049958. Its totient is φ = 72708049956.

The previous prime is 72708049937. The next prime is 72708050003. The reversal of 72708049957 is 75994080727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69692832036 + 3015217921 = 263994^2 + 54911^2 .

It is a cyclic number.

It is not a de Polignac number, because 72708049957 - 2¹⁵ = 72708017189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72708049927) 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, 36354024978 + 36354024979.

It is an arithmetic number, because the mean of its divisors is an integer number (36354024979).

Almost surely, 2^72708049957 is an apocalyptic number.

It is an amenable number.

72708049957 is a deficient number, since it is larger than the sum of its proper divisors (1).

72708049957 is an equidigital number, since it uses as much as digits as its factorization.

72708049957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8890560, while the sum is 58.

The spelling of 72708049957 in words is "seventy-two billion, seven hundred eight million, forty-nine thousand, nine hundred fifty-seven".