131278167677 has 2 divisors, whose sum is σ = 131278167678. Its totient is φ = 131278167676.

The previous prime is 131278167577. The next prime is 131278167749. The reversal of 131278167677 is 776761872131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67605720121 + 63672447556 = 260011^2 + 252334^2 .

It is a cyclic number.

It is not a de Polignac number, because 131278167677 - 2¹⁶ = 131278102141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131278167577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65639083838 + 65639083839.

It is an arithmetic number, because the mean of its divisors is an integer number (65639083839).

Almost surely, 2^131278167677 is an apocalyptic number.

It is an amenable number.

131278167677 is a deficient number, since it is larger than the sum of its proper divisors (1).

131278167677 is an equidigital number, since it uses as much as digits as its factorization.

131278167677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4148928, while the sum is 56.

The spelling of 131278167677 in words is "one hundred thirty-one billion, two hundred seventy-eight million, one hundred sixty-seven thousand, six hundred seventy-seven".