91416118189993 has 2 divisors, whose sum is σ = 91416118189994. Its totient is φ = 91416118189992.

The previous prime is 91416118189973. The next prime is 91416118190017. The reversal of 91416118189993 is 39998181161419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85233276802969 + 6182841387024 = 9232187^2 + 2486532^2 .

It is a cyclic number.

It is not a de Polignac number, because 91416118189993 - 2⁴¹ = 89217094934441 is a prime.

It is not a weakly prime, because it can be changed into another prime (91416118189973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45708059094996 + 45708059094997.

It is an arithmetic number, because the mean of its divisors is an integer number (45708059094997).

Almost surely, 2^{91416118189993} is an apocalyptic number.

It is an amenable number.

91416118189993 is a deficient number, since it is larger than the sum of its proper divisors (1).

91416118189993 is an equidigital number, since it uses as much as digits as its factorization.

91416118189993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30233088, while the sum is 70.

The spelling of 91416118189993 in words is "ninety-one trillion, four hundred sixteen billion, one hundred eighteen million, one hundred eighty-nine thousand, nine hundred ninety-three".