71366640513 has 16 divisors (see below), whose sum is σ = 110372290560. Its totient is φ = 40172265936.

The previous prime is 71366640497. The next prime is 71366640517. The reversal of 71366640513 is 31504666317.

It is not a de Polignac number, because 71366640513 - 2⁴ = 71366640497 is a prime.

It is a super-2 number, since 2×71366640513² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71366640517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25359873 + ... + 25362686.

It is an arithmetic number, because the mean of its divisors is an integer number (6898268160).

Almost surely, 2^71366640513 is an apocalyptic number.

It is an amenable number.

71366640513 is a deficient number, since it is larger than the sum of its proper divisors (39005650047).

71366640513 is a wasteful number, since it uses less digits than its factorization.

71366640513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50722636.

The product of its (nonzero) digits is 272160, while the sum is 42.

The spelling of 71366640513 in words is "seventy-one billion, three hundred sixty-six million, six hundred forty thousand, five hundred thirteen".