71002881799621 has 2 divisors, whose sum is σ = 71002881799622. Its totient is φ = 71002881799620.

The previous prime is 71002881799517. The next prime is 71002881799627. The reversal of 71002881799621 is 12699718820017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49737051002500 + 21265830797121 = 7052450^2 + 4611489^2 .

It is a cyclic number.

It is not a de Polignac number, because 71002881799621 - 2²⁹ = 71002344928709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71002881799621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71002881799627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35501440899810 + 35501440899811.

It is an arithmetic number, because the mean of its divisors is an integer number (35501440899811).

Almost surely, 2^{71002881799621} is an apocalyptic number.

It is an amenable number.

71002881799621 is a deficient number, since it is larger than the sum of its proper divisors (1).

71002881799621 is an equidigital number, since it uses as much as digits as its factorization.

71002881799621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6096384, while the sum is 61.

The spelling of 71002881799621 in words is "seventy-one trillion, two billion, eight hundred eighty-one million, seven hundred ninety-nine thousand, six hundred twenty-one".