81418983979007 has 2 divisors, whose sum is σ = 81418983979008. Its totient is φ = 81418983979006.

The previous prime is 81418983979001. The next prime is 81418983979013. The reversal of 81418983979007 is 70097938981418.

It is a balanced prime because it is at equal distance from previous prime (81418983979001) and next prime (81418983979013).

It is a cyclic number.

It is not a de Polignac number, because 81418983979007 - 2⁴ = 81418983978991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81418983979001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40709491989503 + 40709491989504.

It is an arithmetic number, because the mean of its divisors is an integer number (40709491989504).

Almost surely, 2^{81418983979007} is an apocalyptic number.

81418983979007 is a deficient number, since it is larger than the sum of its proper divisors (1).

81418983979007 is an equidigital number, since it uses as much as digits as its factorization.

81418983979007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 219469824, while the sum is 74.

The spelling of 81418983979007 in words is "eighty-one trillion, four hundred eighteen billion, nine hundred eighty-three million, nine hundred seventy-nine thousand, seven".