81083674747 has 2 divisors, whose sum is σ = 81083674748. Its totient is φ = 81083674746.

The previous prime is 81083674681. The next prime is 81083674769. The reversal of 81083674747 is 74747638018.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81083674747 - 2³¹ = 78936191099 is a prime.

It is not a weakly prime, because it can be changed into another prime (81083677747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40541837373 + 40541837374.

It is an arithmetic number, because the mean of its divisors is an integer number (40541837374).

Almost surely, 2^81083674747 is an apocalyptic number.

81083674747 is a deficient number, since it is larger than the sum of its proper divisors (1).

81083674747 is an equidigital number, since it uses as much as digits as its factorization.

81083674747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6322176, while the sum is 55.

The spelling of 81083674747 in words is "eighty-one billion, eighty-three million, six hundred seventy-four thousand, seven hundred forty-seven".