1618731618860 has 48 divisors (see below), whose sum is σ = 3407083680000. Its totient is φ = 646017695424.

The previous prime is 1618731618851. The next prime is 1618731618863. The reversal of 1618731618860 is 688161378161.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1618731618796 and 1618731618805.

It is not an unprimeable number, because it can be changed into a prime (1618731618863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39929681 + ... + 39970199.

It is an arithmetic number, because the mean of its divisors is an integer number (70980910000).

Almost surely, 2^{1618731618860} is an apocalyptic number.

1618731618860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1618731618860 is an abundant number, since it is smaller than the sum of its proper divisors (1788352061140).

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

1618731618860 is a wasteful number, since it uses less digits than its factorization.

1618731618860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45030 (or 45028 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 56.

The spelling of 1618731618860 in words is "one trillion, six hundred eighteen billion, seven hundred thirty-one million, six hundred eighteen thousand, eight hundred sixty".