118640541491 has 2 divisors, whose sum is σ = 118640541492. Its totient is φ = 118640541490.

The previous prime is 118640541479. The next prime is 118640541557. The reversal of 118640541491 is 194145046811.

It is a weak prime.

It is an emirp because it is prime and its reverse (194145046811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118640541491 - 2¹⁰ = 118640540467 is a prime.

It is not a weakly prime, because it can be changed into another prime (118640541401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59320270745 + 59320270746.

It is an arithmetic number, because the mean of its divisors is an integer number (59320270746).

Almost surely, 2^118640541491 is an apocalyptic number.

118640541491 is a deficient number, since it is larger than the sum of its proper divisors (1).

118640541491 is an equidigital number, since it uses as much as digits as its factorization.

118640541491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 44.

The spelling of 118640541491 in words is "one hundred eighteen billion, six hundred forty million, five hundred forty-one thousand, four hundred ninety-one".