71512997099 has 2 divisors, whose sum is σ = 71512997100. Its totient is φ = 71512997098.

The previous prime is 71512997047. The next prime is 71512997131. The reversal of 71512997099 is 99079921517.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71512997099 - 2²⁰ = 71511948523 is a prime.

It is a super-2 number, since 2×71512997099² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71512997029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35756498549 + 35756498550.

It is an arithmetic number, because the mean of its divisors is an integer number (35756498550).

Almost surely, 2^71512997099 is an apocalyptic number.

71512997099 is a deficient number, since it is larger than the sum of its proper divisors (1).

71512997099 is an equidigital number, since it uses as much as digits as its factorization.

71512997099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3214890, while the sum is 59.

The spelling of 71512997099 in words is "seventy-one billion, five hundred twelve million, nine hundred ninety-seven thousand, ninety-nine".