71507864293 has 2 divisors, whose sum is σ = 71507864294. Its totient is φ = 71507864292.

The previous prime is 71507864273. The next prime is 71507864299. The reversal of 71507864293 is 39246870517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45165600484 + 26342263809 = 212522^2 + 162303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71507864293 is a prime.

It is a super-2 number, since 2×71507864293² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71507864293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71507864299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35753932146 + 35753932147.

It is an arithmetic number, because the mean of its divisors is an integer number (35753932147).

It is a 1-persistent number, because it is pandigital, but 2⋅71507864293 = 143015728586 is not.

Almost surely, 2^71507864293 is an apocalyptic number.

It is an amenable number.

71507864293 is a deficient number, since it is larger than the sum of its proper divisors (1).

71507864293 is an equidigital number, since it uses as much as digits as its factorization.

71507864293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 71507864293 in words is "seventy-one billion, five hundred seven million, eight hundred sixty-four thousand, two hundred ninety-three".