71012400539 has 2 divisors, whose sum is σ = 71012400540. Its totient is φ = 71012400538.

The previous prime is 71012400509. The next prime is 71012400559. The reversal of 71012400539 is 93500421017.

It is a strong prime.

It is an emirp because it is prime and its reverse (93500421017) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71012400539 - 2¹² = 71012396443 is a prime.

It is a super-2 number, since 2×71012400539² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71012400509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35506200269 + 35506200270.

It is an arithmetic number, because the mean of its divisors is an integer number (35506200270).

Almost surely, 2^71012400539 is an apocalyptic number.

71012400539 is a deficient number, since it is larger than the sum of its proper divisors (1).

71012400539 is an equidigital number, since it uses as much as digits as its factorization.

71012400539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The spelling of 71012400539 in words is "seventy-one billion, twelve million, four hundred thousand, five hundred thirty-nine".