67509378331 has 2 divisors, whose sum is σ = 67509378332. Its totient is φ = 67509378330.

The previous prime is 67509378269. The next prime is 67509378337. The reversal of 67509378331 is 13387390576.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67509378331 - 2¹³ = 67509370139 is a prime.

It is a super-2 number, since 2×67509378331² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67509378337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33754689165 + 33754689166.

It is an arithmetic number, because the mean of its divisors is an integer number (33754689166).

Almost surely, 2^67509378331 is an apocalyptic number.

67509378331 is a deficient number, since it is larger than the sum of its proper divisors (1).

67509378331 is an equidigital number, since it uses as much as digits as its factorization.

67509378331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2857680, while the sum is 52.

It can be divided in two parts, 675093 and 78331, that added together give a square (753424 = 868²).

The spelling of 67509378331 in words is "sixty-seven billion, five hundred nine million, three hundred seventy-eight thousand, three hundred thirty-one".