71513419643 has 2 divisors, whose sum is σ = 71513419644. Its totient is φ = 71513419642.

The previous prime is 71513419639. The next prime is 71513419661. The reversal of 71513419643 is 34691431517.

It is a weak prime.

It is an emirp because it is prime and its reverse (34691431517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71513419643 - 2² = 71513419639 is a prime.

It is a super-2 number, since 2×71513419643² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71513419594 and 71513419603.

It is not a weakly prime, because it can be changed into another prime (71513419343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35756709821 + 35756709822.

It is an arithmetic number, because the mean of its divisors is an integer number (35756709822).

Almost surely, 2^71513419643 is an apocalyptic number.

71513419643 is a deficient number, since it is larger than the sum of its proper divisors (1).

71513419643 is an equidigital number, since it uses as much as digits as its factorization.

71513419643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The spelling of 71513419643 in words is "seventy-one billion, five hundred thirteen million, four hundred nineteen thousand, six hundred forty-three".