71057321407 has 2 divisors, whose sum is σ = 71057321408. Its totient is φ = 71057321406.

The previous prime is 71057321393. The next prime is 71057321417. The reversal of 71057321407 is 70412375017.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (70412375017) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71057321407 - 2²⁷ = 70923103679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71057321417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35528660703 + 35528660704.

It is an arithmetic number, because the mean of its divisors is an integer number (35528660704).

Almost surely, 2^71057321407 is an apocalyptic number.

71057321407 is a deficient number, since it is larger than the sum of its proper divisors (1).

71057321407 is an equidigital number, since it uses as much as digits as its factorization.

71057321407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41160, while the sum is 37.

The spelling of 71057321407 in words is "seventy-one billion, fifty-seven million, three hundred twenty-one thousand, four hundred seven".