93481806622781 has 2 divisors, whose sum is σ = 93481806622782. Its totient is φ = 93481806622780.

The previous prime is 93481806622741. The next prime is 93481806622807. The reversal of 93481806622781 is 18722660818439.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85735932796900 + 7745873825881 = 9259370^2 + 2783141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-93481806622781 is a prime.

It is a super-2 number, since 2×93481806622781² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93481806622741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46740903311390 + 46740903311391.

It is an arithmetic number, because the mean of its divisors is an integer number (46740903311391).

Almost surely, 2^{93481806622781} is an apocalyptic number.

It is an amenable number.

93481806622781 is a deficient number, since it is larger than the sum of its proper divisors (1).

93481806622781 is an equidigital number, since it uses as much as digits as its factorization.

93481806622781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55738368, while the sum is 65.

The spelling of 93481806622781 in words is "ninety-three trillion, four hundred eighty-one billion, eight hundred six million, six hundred twenty-two thousand, seven hundred eighty-one".