81629147711 has 2 divisors, whose sum is σ = 81629147712. Its totient is φ = 81629147710.

The previous prime is 81629147701. The next prime is 81629147731. The reversal of 81629147711 is 11774192618.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81629147711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81629147701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40814573855 + 40814573856.

It is an arithmetic number, because the mean of its divisors is an integer number (40814573856).

Almost surely, 2^81629147711 is an apocalyptic number.

81629147711 is a deficient number, since it is larger than the sum of its proper divisors (1).

81629147711 is an equidigital number, since it uses as much as digits as its factorization.

81629147711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 47.

The spelling of 81629147711 in words is "eighty-one billion, six hundred twenty-nine million, one hundred forty-seven thousand, seven hundred eleven".