1861618130808 has 32 divisors (see below), whose sum is σ = 4804175823360. Its totient is φ = 600521977440.

The previous prime is 1861618130791. The next prime is 1861618130857. The reversal of 1861618130808 is 8080318161681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1251086710 + ... + 1251088197.

It is an arithmetic number, because the mean of its divisors is an integer number (150130494480).

Almost surely, 2^{1861618130808} is an apocalyptic number.

It is an amenable number.

1861618130808 is an abundant number, since it is smaller than the sum of its proper divisors (2942557692552).

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

1861618130808 is a wasteful number, since it uses less digits than its factorization.

1861618130808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502174947 (or 2502174943 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 51.

The spelling of 1861618130808 in words is "one trillion, eight hundred sixty-one billion, six hundred eighteen million, one hundred thirty thousand, eight hundred eight".