1994102656 has 128 divisors (see below), whose sum is σ = 4923172800. Its totient is φ = 788097024.

The previous prime is 1994102647. The next prime is 1994102681. The reversal of 1994102656 is 6562014991.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1968006 + ... + 1969018.

Almost surely, 2^1994102656 is an apocalyptic number.

1994102656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1994102656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2461586400).

1994102656 is an abundant number, since it is smaller than the sum of its proper divisors (2929070144).

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

1994102656 is an equidigital number, since it uses as much as digits as its factorization.

1994102656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073 (or 1035 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 1994102656 is about 44655.3765631867. The cubic root of 1994102656 is about 1258.6814660793.

The spelling of 1994102656 in words is "one billion, nine hundred ninety-four million, one hundred two thousand, six hundred fifty-six".