918606387491 has 8 divisors (see below), whose sum is σ = 989276257200. Its totient is φ = 847937637792.

The previous prime is 918606387463. The next prime is 918606387539. The reversal of 918606387491 is 194783606819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-918606387491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (918606387431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2312585 + ... + 2680533.

It is an arithmetic number, because the mean of its divisors is an integer number (123659532150).

Almost surely, 2^918606387491 is an apocalyptic number.

918606387491 is a deficient number, since it is larger than the sum of its proper divisors (70669869709).

918606387491 is a wasteful number, since it uses less digits than its factorization.

918606387491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560005.

The product of its (nonzero) digits is 15676416, while the sum is 62.

The spelling of 918606387491 in words is "nine hundred eighteen billion, six hundred six million, three hundred eighty-seven thousand, four hundred ninety-one".