71297853773 has 2 divisors, whose sum is σ = 71297853774. Its totient is φ = 71297853772.

The previous prime is 71297853769. The next prime is 71297853779. The reversal of 71297853773 is 37735879217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69918994084 + 1378859689 = 264422^2 + 37133^2 .

It is a cyclic number.

It is not a de Polignac number, because 71297853773 - 2² = 71297853769 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71297853779) 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, 35648926886 + 35648926887.

It is an arithmetic number, because the mean of its divisors is an integer number (35648926887).

Almost surely, 2^71297853773 is an apocalyptic number.

It is an amenable number.

71297853773 is a deficient number, since it is larger than the sum of its proper divisors (1).

71297853773 is an equidigital number, since it uses as much as digits as its factorization.

71297853773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15558480, while the sum is 59.

The spelling of 71297853773 in words is "seventy-one billion, two hundred ninety-seven million, eight hundred fifty-three thousand, seven hundred seventy-three".