78571880213 has 2 divisors, whose sum is σ = 78571880214. Its totient is φ = 78571880212.

The previous prime is 78571880203. The next prime is 78571880221. The reversal of 78571880213 is 31208817587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78063242404 + 508637809 = 279398^2 + 22553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78571880213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78571880203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39285940106 + 39285940107.

It is an arithmetic number, because the mean of its divisors is an integer number (39285940107).

Almost surely, 2^78571880213 is an apocalyptic number.

It is an amenable number.

78571880213 is a deficient number, since it is larger than the sum of its proper divisors (1).

78571880213 is an equidigital number, since it uses as much as digits as its factorization.

78571880213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 752640, while the sum is 50.

The spelling of 78571880213 in words is "seventy-eight billion, five hundred seventy-one million, eight hundred eighty thousand, two hundred thirteen".