81037703347 has 2 divisors, whose sum is σ = 81037703348. Its totient is φ = 81037703346.

The previous prime is 81037703317. The next prime is 81037703489. The reversal of 81037703347 is 74330773018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81037703347 - 2²³ = 81029314739 is a prime.

It is not a weakly prime, because it can be changed into another prime (81037703317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40518851673 + 40518851674.

It is an arithmetic number, because the mean of its divisors is an integer number (40518851674).

Almost surely, 2^81037703347 is an apocalyptic number.

81037703347 is a deficient number, since it is larger than the sum of its proper divisors (1).

81037703347 is an equidigital number, since it uses as much as digits as its factorization.

81037703347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 296352, while the sum is 43.

The spelling of 81037703347 in words is "eighty-one billion, thirty-seven million, seven hundred three thousand, three hundred forty-seven".