1944654656 has 28 divisors (see below), whose sum is σ = 4410199968. Its totient is φ = 833423232.

The previous prime is 1944654631. The next prime is 1944654659. The reversal of 1944654656 is 6564564491.

1944654656 = T₂₃₅₆₈ + T₂₃₅₆₉ + ... + T₂₃₅₇₄.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×1944654656² = 7563363462204956672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1944654659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2169926 + ... + 2170821.

Almost surely, 2^1944654656 is an apocalyptic number.

1944654656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1944654656 is an abundant number, since it is smaller than the sum of its proper divisors (2465545312).

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

1944654656 is an equidigital number, since it uses as much as digits as its factorization.

1944654656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4340766 (or 4340756 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 50.

The square root of 1944654656 is about 44098.2386949864. The cubic root of 1944654656 is about 1248.1903747494.

The spelling of 1944654656 in words is "one billion, nine hundred forty-four million, six hundred fifty-four thousand, six hundred fifty-six".