72556771341797 has 2 divisors, whose sum is σ = 72556771341798. Its totient is φ = 72556771341796.

The previous prime is 72556771341653. The next prime is 72556771341809. The reversal of 72556771341797 is 79714317765527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67907340029281 + 4649431312516 = 8240591^2 + 2156254^2 .

It is a cyclic number.

It is not a de Polignac number, because 72556771341797 - 2⁸ = 72556771341541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72556771341797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72556771371797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36278385670898 + 36278385670899.

It is an arithmetic number, because the mean of its divisors is an integer number (36278385670899).

Almost surely, 2^{72556771341797} is an apocalyptic number.

It is an amenable number.

72556771341797 is a deficient number, since it is larger than the sum of its proper divisors (1).

72556771341797 is an equidigital number, since it uses as much as digits as its factorization.

72556771341797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544546800, while the sum is 71.

The spelling of 72556771341797 in words is "seventy-two trillion, five hundred fifty-six billion, seven hundred seventy-one million, three hundred forty-one thousand, seven hundred ninety-seven".