71860900849 has 2 divisors, whose sum is σ = 71860900850. Its totient is φ = 71860900848.

The previous prime is 71860900843. The next prime is 71860900861. The reversal of 71860900849 is 94800906817.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42120173824 + 29740727025 = 205232^2 + 172455^2 .

It is a cyclic number.

It is not a de Polignac number, because 71860900849 - 2³ = 71860900841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71860900796 and 71860900805.

It is not a weakly prime, because it can be changed into another prime (71860900841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35930450424 + 35930450425.

It is an arithmetic number, because the mean of its divisors is an integer number (35930450425).

Almost surely, 2^71860900849 is an apocalyptic number.

It is an amenable number.

71860900849 is a deficient number, since it is larger than the sum of its proper divisors (1).

71860900849 is an equidigital number, since it uses as much as digits as its factorization.

71860900849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 71860900849 in words is "seventy-one billion, eight hundred sixty million, nine hundred thousand, eight hundred forty-nine".