72908408357573 has 2 divisors, whose sum is σ = 72908408357574. Its totient is φ = 72908408357572.

The previous prime is 72908408357567. The next prime is 72908408357633. The reversal of 72908408357573 is 37575380480927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72819632367364 + 88775990209 = 8533442^2 + 297953^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72908408357573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72908408857573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36454204178786 + 36454204178787.

It is an arithmetic number, because the mean of its divisors is an integer number (36454204178787).

Almost surely, 2^{72908408357573} is an apocalyptic number.

It is an amenable number.

72908408357573 is a deficient number, since it is larger than the sum of its proper divisors (1).

72908408357573 is an equidigital number, since it uses as much as digits as its factorization.

72908408357573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 355622400, while the sum is 68.

The spelling of 72908408357573 in words is "seventy-two trillion, nine hundred eight billion, four hundred eight million, three hundred fifty-seven thousand, five hundred seventy-three".