9618940414591 has 2 divisors, whose sum is σ = 9618940414592. Its totient is φ = 9618940414590.

The previous prime is 9618940414583. The next prime is 9618940414631. The reversal of 9618940414591 is 1954140498169.

It is a weak prime.

It is an emirp because it is prime and its reverse (1954140498169) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9618940414591 - 2³ = 9618940414583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9618940414541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4809470207295 + 4809470207296.

It is an arithmetic number, because the mean of its divisors is an integer number (4809470207296).

Almost surely, 2^{9618940414591} is an apocalyptic number.

9618940414591 is a deficient number, since it is larger than the sum of its proper divisors (1).

9618940414591 is an equidigital number, since it uses as much as digits as its factorization.

9618940414591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11197440, while the sum is 61.

The spelling of 9618940414591 in words is "nine trillion, six hundred eighteen billion, nine hundred forty million, four hundred fourteen thousand, five hundred ninety-one".