1988043656959 has 8 divisors (see below), whose sum is σ = 2105023061808. Its totient is φ = 1871068214400.

The previous prime is 1988043656941. The next prime is 1988043656981. The reversal of 1988043656959 is 9596563408891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1988043656959 - 2²⁷ = 1987909439231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1988043656891 and 1988043656900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988043656999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75204 + ... + 1995430.

It is an arithmetic number, because the mean of its divisors is an integer number (263127882726).

Almost surely, 2^{1988043656959} is an apocalyptic number.

1988043656959 is a deficient number, since it is larger than the sum of its proper divisors (116979404849).

1988043656959 is a wasteful number, since it uses less digits than its factorization.

1988043656959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981145.

The product of its (nonzero) digits is 503884800, while the sum is 73.

The spelling of 1988043656959 in words is "one trillion, nine hundred eighty-eight billion, forty-three million, six hundred fifty-six thousand, nine hundred fifty-nine".