81761133367 has 2 divisors, whose sum is σ = 81761133368. Its totient is φ = 81761133366.

The previous prime is 81761133331. The next prime is 81761133403. The reversal of 81761133367 is 76333116718.

It is a balanced prime because it is at equal distance from previous prime (81761133331) and next prime (81761133403).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81761133367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81761133967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40880566683 + 40880566684.

It is an arithmetic number, because the mean of its divisors is an integer number (40880566684).

Almost surely, 2^81761133367 is an apocalyptic number.

81761133367 is a deficient number, since it is larger than the sum of its proper divisors (1).

81761133367 is an equidigital number, since it uses as much as digits as its factorization.

81761133367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 46.

The spelling of 81761133367 in words is "eighty-one billion, seven hundred sixty-one million, one hundred thirty-three thousand, three hundred sixty-seven".