71853138787 has 2 divisors, whose sum is σ = 71853138788. Its totient is φ = 71853138786.

The previous prime is 71853138779. The next prime is 71853138809. The reversal of 71853138787 is 78783135817.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71853138787 - 2³ = 71853138779 is a prime.

It is not a weakly prime, because it can be changed into another prime (71853138737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35926569393 + 35926569394.

It is an arithmetic number, because the mean of its divisors is an integer number (35926569394).

Almost surely, 2^71853138787 is an apocalyptic number.

71853138787 is a deficient number, since it is larger than the sum of its proper divisors (1).

71853138787 is an equidigital number, since it uses as much as digits as its factorization.

71853138787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7902720, while the sum is 58.

The spelling of 71853138787 in words is "seventy-one billion, eight hundred fifty-three million, one hundred thirty-eight thousand, seven hundred eighty-seven".