81804310801 has 2 divisors, whose sum is σ = 81804310802. Its totient is φ = 81804310800.

The previous prime is 81804310699. The next prime is 81804310843. The reversal of 81804310801 is 10801340818.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64910810176 + 16893500625 = 254776^2 + 129975^2 .

It is a cyclic number.

It is not a de Polignac number, because 81804310801 - 2¹⁷ = 81804179729 is a prime.

It is not a weakly prime, because it can be changed into another prime (81804310201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40902155400 + 40902155401.

It is an arithmetic number, because the mean of its divisors is an integer number (40902155401).

Almost surely, 2^81804310801 is an apocalyptic number.

It is an amenable number.

81804310801 is a deficient number, since it is larger than the sum of its proper divisors (1).

81804310801 is an equidigital number, since it uses as much as digits as its factorization.

81804310801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 34.

The spelling of 81804310801 in words is "eighty-one billion, eight hundred four million, three hundred ten thousand, eight hundred one".