72101685797 has 2 divisors, whose sum is σ = 72101685798. Its totient is φ = 72101685796.

The previous prime is 72101685791. The next prime is 72101685809. The reversal of 72101685797 is 79758610127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69839161441 + 2262524356 = 264271^2 + 47566^2 .

It is a cyclic number.

It is not a de Polignac number, because 72101685797 - 2¹⁰ = 72101684773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72101685791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36050842898 + 36050842899.

It is an arithmetic number, because the mean of its divisors is an integer number (36050842899).

Almost surely, 2^72101685797 is an apocalyptic number.

It is an amenable number.

72101685797 is a deficient number, since it is larger than the sum of its proper divisors (1).

72101685797 is an equidigital number, since it uses as much as digits as its factorization.

72101685797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1481760, while the sum is 53.

The spelling of 72101685797 in words is "seventy-two billion, one hundred one million, six hundred eighty-five thousand, seven hundred ninety-seven".