1988851863264 has 144 divisors (see below), whose sum is σ = 6392738419200. Its totient is φ = 538335818496.

The previous prime is 1988851863253. The next prime is 1988851863287. The reversal of 1988851863264 is 4623681588891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11036944 + ... + 11215695.

It is an arithmetic number, because the mean of its divisors is an integer number (44394016800).

Almost surely, 2^{1988851863264} is an apocalyptic number.

1988851863264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1988851863264 is an abundant number, since it is smaller than the sum of its proper divisors (4403886555936).

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

1988851863264 is a wasteful number, since it uses less digits than its factorization.

1988851863264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22252685 (or 22252670 counting only the distinct ones).

The product of its digits is 159252480, while the sum is 69.

The spelling of 1988851863264 in words is "one trillion, nine hundred eighty-eight billion, eight hundred fifty-one million, eight hundred sixty-three thousand, two hundred sixty-four".