7918408861 has 8 divisors (see below), whose sum is σ = 8642347200. Its totient is φ = 7195151040.

The previous prime is 7918408853. The next prime is 7918408867. The reversal of 7918408861 is 1688048197.

It is a happy number.

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

It is not a de Polignac number, because 7918408861 - 2³ = 7918408853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7918408799 and 7918408808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7918408867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145641 + ... + 192478.

It is an arithmetic number, because the mean of its divisors is an integer number (1080293400).

Almost surely, 2^7918408861 is an apocalyptic number.

It is an amenable number.

7918408861 is a deficient number, since it is larger than the sum of its proper divisors (723938339).

7918408861 is a wasteful number, since it uses less digits than its factorization.

7918408861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340259.

The product of its (nonzero) digits is 774144, while the sum is 52.

The square root of 7918408861 is about 88985.4418486530. The cubic root of 7918408861 is about 1993.1774915698.

The spelling of 7918408861 in words is "seven billion, nine hundred eighteen million, four hundred eight thousand, eight hundred sixty-one".