7818081606 has 40 divisors (see below), whose sum is σ = 17573672160. Its totient is φ = 2597789232.

The previous prime is 7818081599. The next prime is 7818081613. The reversal of 7818081606 is 6061808187.

It is an interprime number because it is at equal distance from previous prime (7818081599) and next prime (7818081613).

It is a super-2 number, since 2×7818081606² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24766 + ... + 127473.

It is an arithmetic number, because the mean of its divisors is an integer number (439341804).

Almost surely, 2^7818081606 is an apocalyptic number.

7818081606 is an abundant number, since it is smaller than the sum of its proper divisors (9755590554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7818081606 is a wasteful number, since it uses less digits than its factorization.

7818081606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152570 (or 152561 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 7818081606 is about 88419.9163424169. The cubic root of 7818081606 is about 1984.7237489879.

The spelling of 7818081606 in words is "seven billion, eight hundred eighteen million, eighty-one thousand, six hundred six".