1918107976518 has 12 divisors (see below), whose sum is σ = 4155900615828. Its totient is φ = 639369325500.

The previous prime is 1918107976459. The next prime is 1918107976537. The reversal of 1918107976518 is 8156797018191.

1918107976518 is a `hidden beast` number, since 1 + 9 + 1 + 8 + 107 + 9 + 7 + 6 + 518 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53280777108 + ... + 53280777143.

It is an arithmetic number, because the mean of its divisors is an integer number (346325051319).

Almost surely, 2^{1918107976518} is an apocalyptic number.

1918107976518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1918107976518 is an abundant number, since it is smaller than the sum of its proper divisors (2237792639310).

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

1918107976518 is a wasteful number, since it uses less digits than its factorization.

1918107976518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106561554259 (or 106561554256 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 63.

The spelling of 1918107976518 in words is "one trillion, nine hundred eighteen billion, one hundred seven million, nine hundred seventy-six thousand, five hundred eighteen".