81068476747 has 2 divisors, whose sum is σ = 81068476748. Its totient is φ = 81068476746.

The previous prime is 81068476739. The next prime is 81068476757. The reversal of 81068476747 is 74767486018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81068476747 - 2³ = 81068476739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81068476691 and 81068476700.

It is not a weakly prime, because it can be changed into another prime (81068476757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40534238373 + 40534238374.

It is an arithmetic number, because the mean of its divisors is an integer number (40534238374).

Almost surely, 2^81068476747 is an apocalyptic number.

81068476747 is a deficient number, since it is larger than the sum of its proper divisors (1).

81068476747 is an equidigital number, since it uses as much as digits as its factorization.

81068476747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12644352, while the sum is 58.

The spelling of 81068476747 in words is "eighty-one billion, sixty-eight million, four hundred seventy-six thousand, seven hundred forty-seven".