1944051481 has 16 divisors (see below), whose sum is σ = 2077286400. Its totient is φ = 1814045328.

The previous prime is 1944051467. The next prime is 1944051491. The reversal of 1944051481 is 1841504491.

It is a cyclic number.

It is not a de Polignac number, because 1944051481 - 2¹⁷ = 1943920409 is a prime.

It is a super-2 number, since 2×1944051481² = 7558672321556586722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1944051481.

It is not an unprimeable number, because it can be changed into a prime (1944051491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577080 + ... + 580438.

It is an arithmetic number, because the mean of its divisors is an integer number (129830400).

Almost surely, 2^1944051481 is an apocalyptic number.

It is an amenable number.

1944051481 is a deficient number, since it is larger than the sum of its proper divisors (133234919).

1944051481 is a wasteful number, since it uses less digits than its factorization.

1944051481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3828.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 1944051481 is about 44091.3991726278. The cubic root of 1944051481 is about 1248.0613106881.

The spelling of 1944051481 in words is "one billion, nine hundred forty-four million, fifty-one thousand, four hundred eighty-one".