81270847363 has 2 divisors, whose sum is σ = 81270847364. Its totient is φ = 81270847362.

The previous prime is 81270847249. The next prime is 81270847403. The reversal of 81270847363 is 36374807218.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81270847363 is a prime.

It is a super-2 number, since 2×81270847363² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (81270857363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40635423681 + 40635423682.

It is an arithmetic number, because the mean of its divisors is an integer number (40635423682).

Almost surely, 2^81270847363 is an apocalyptic number.

81270847363 is a deficient number, since it is larger than the sum of its proper divisors (1).

81270847363 is an equidigital number, since it uses as much as digits as its factorization.

81270847363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The spelling of 81270847363 in words is "eighty-one billion, two hundred seventy million, eight hundred forty-seven thousand, three hundred sixty-three".