81488862043 has 2 divisors, whose sum is σ = 81488862044. Its totient is φ = 81488862042.

The previous prime is 81488862001. The next prime is 81488862067. The reversal of 81488862043 is 34026888418.

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-81488862043 is a prime.

It is a super-2 number, since 2×81488862043² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (81488862643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40744431021 + 40744431022.

It is an arithmetic number, because the mean of its divisors is an integer number (40744431022).

Almost surely, 2^81488862043 is an apocalyptic number.

81488862043 is a deficient number, since it is larger than the sum of its proper divisors (1).

81488862043 is an equidigital number, since it uses as much as digits as its factorization.

81488862043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2359296, while the sum is 52.

The spelling of 81488862043 in words is "eighty-one billion, four hundred eighty-eight million, eight hundred sixty-two thousand, forty-three".