71507943733 has 2 divisors, whose sum is σ = 71507943734. Its totient is φ = 71507943732.

The previous prime is 71507943707. The next prime is 71507943751. The reversal of 71507943733 is 33734970517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66534591249 + 4973352484 = 257943^2 + 70522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71507943733 is a prime.

It is a super-2 number, since 2×71507943733² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71507943433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35753971866 + 35753971867.

It is an arithmetic number, because the mean of its divisors is an integer number (35753971867).

Almost surely, 2^71507943733 is an apocalyptic number.

It is an amenable number.

71507943733 is a deficient number, since it is larger than the sum of its proper divisors (1).

71507943733 is an equidigital number, since it uses as much as digits as its factorization.

71507943733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1666980, while the sum is 49.

The spelling of 71507943733 in words is "seventy-one billion, five hundred seven million, nine hundred forty-three thousand, seven hundred thirty-three".