67631654309977 has 2 divisors, whose sum is σ = 67631654309978. Its totient is φ = 67631654309976.

The previous prime is 67631654309903. The next prime is 67631654310019. The reversal of 67631654309977 is 77990345613676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67151288878921 + 480365431056 = 8194589^2 + 693084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67631654309977 is a prime.

It is not a weakly prime, because it can be changed into another prime (67631654309377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33815827154988 + 33815827154989.

It is an arithmetic number, because the mean of its divisors is an integer number (33815827154989).

Almost surely, 2^{67631654309977} is an apocalyptic number.

It is an amenable number.

67631654309977 is a deficient number, since it is larger than the sum of its proper divisors (1).

67631654309977 is an equidigital number, since it uses as much as digits as its factorization.

67631654309977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080203040, while the sum is 73.

The spelling of 67631654309977 in words is "sixty-seven trillion, six hundred thirty-one billion, six hundred fifty-four million, three hundred nine thousand, nine hundred seventy-seven".