67637391361 has 2 divisors, whose sum is σ = 67637391362. Its totient is φ = 67637391360.

The previous prime is 67637391313. The next prime is 67637391383. The reversal of 67637391361 is 16319373676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53989310736 + 13648080625 = 232356^2 + 116825^2 .

It is a cyclic number.

It is not a de Polignac number, because 67637391361 - 2²⁹ = 67100520449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67637391299 and 67637391308.

It is not a weakly prime, because it can be changed into another prime (67637391461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33818695680 + 33818695681.

It is an arithmetic number, because the mean of its divisors is an integer number (33818695681).

Almost surely, 2^67637391361 is an apocalyptic number.

It is an amenable number.

67637391361 is a deficient number, since it is larger than the sum of its proper divisors (1).

67637391361 is an equidigital number, since it uses as much as digits as its factorization.

67637391361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2571912, while the sum is 52.

The spelling of 67637391361 in words is "sixty-seven billion, six hundred thirty-seven million, three hundred ninety-one thousand, three hundred sixty-one".