81547462760341 has 2 divisors, whose sum is σ = 81547462760342. Its totient is φ = 81547462760340.

The previous prime is 81547462760327. The next prime is 81547462760447. The reversal of 81547462760341 is 14306726474518.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77136328687441 + 4411134072900 = 8782729^2 + 2100270^2 .

It is a cyclic number.

It is not a de Polignac number, because 81547462760341 - 2⁷ = 81547462760213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81547462760321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40773731380170 + 40773731380171.

It is an arithmetic number, because the mean of its divisors is an integer number (40773731380171).

Almost surely, 2^{81547462760341} is an apocalyptic number.

It is an amenable number.

81547462760341 is a deficient number, since it is larger than the sum of its proper divisors (1).

81547462760341 is an equidigital number, since it uses as much as digits as its factorization.

81547462760341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27095040, while the sum is 58.

The spelling of 81547462760341 in words is "eighty-one trillion, five hundred forty-seven billion, four hundred sixty-two million, seven hundred sixty thousand, three hundred forty-one".