1988115543 has 32 divisors (see below), whose sum is σ = 3024806400. Its totient is φ = 1289822400.

The previous prime is 1988115539. The next prime is 1988115551. The reversal of 1988115543 is 3455118891.

1988115543 is a `hidden beast` number, since 1 + 9 + 88 + 11 + 554 + 3 = 666.

It is not a de Polignac number, because 1988115543 - 2² = 1988115539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988119543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 483928 + ... + 488018.

It is an arithmetic number, because the mean of its divisors is an integer number (94525200).

Almost surely, 2^1988115543 is an apocalyptic number.

1988115543 is a deficient number, since it is larger than the sum of its proper divisors (1036690857).

1988115543 is a wasteful number, since it uses less digits than its factorization.

1988115543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4580 (or 4574 counting only the distinct ones).

The product of its digits is 172800, while the sum is 45.

The square root of 1988115543 is about 44588.2893033586. The cubic root of 1988115543 is about 1257.4205108201.

The spelling of 1988115543 in words is "one billion, nine hundred eighty-eight million, one hundred fifteen thousand, five hundred forty-three".