71838195677 has 2 divisors, whose sum is σ = 71838195678. Its totient is φ = 71838195676.

The previous prime is 71838195641. The next prime is 71838195697. The reversal of 71838195677 is 77659183817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61514416441 + 10323779236 = 248021^2 + 101606^2 .

It is an emirp because it is prime and its reverse (77659183817) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71838195677 - 2⁶ = 71838195613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71838195697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35919097838 + 35919097839.

It is an arithmetic number, because the mean of its divisors is an integer number (35919097839).

Almost surely, 2^71838195677 is an apocalyptic number.

It is an amenable number.

71838195677 is a deficient number, since it is larger than the sum of its proper divisors (1).

71838195677 is an equidigital number, since it uses as much as digits as its factorization.

71838195677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17781120, while the sum is 62.

The spelling of 71838195677 in words is "seventy-one billion, eight hundred thirty-eight million, one hundred ninety-five thousand, six hundred seventy-seven".