71511617011 has 2 divisors, whose sum is σ = 71511617012. Its totient is φ = 71511617010.

The previous prime is 71511616973. The next prime is 71511617017. The reversal of 71511617011 is 11071611517.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71511617011 - 2¹¹ = 71511614963 is a prime.

It is a super-2 number, since 2×71511617011² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71511617017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35755808505 + 35755808506.

It is an arithmetic number, because the mean of its divisors is an integer number (35755808506).

Almost surely, 2^71511617011 is an apocalyptic number.

71511617011 is a deficient number, since it is larger than the sum of its proper divisors (1).

71511617011 is an equidigital number, since it uses as much as digits as its factorization.

71511617011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1470, while the sum is 31.

The spelling of 71511617011 in words is "seventy-one billion, five hundred eleven million, six hundred seventeen thousand, eleven".