1609954144 has 36 divisors (see below), whose sum is σ = 3186206604. Its totient is φ = 800776704.

The previous prime is 1609954133. The next prime is 1609954147. The reversal of 1609954144 is 4414599061.

It is a self number, because there is not a number n which added to its sum of digits gives 1609954144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1609954147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3633987 + ... + 3634429.

It is an arithmetic number, because the mean of its divisors is an integer number (88505739).

Almost surely, 2^1609954144 is an apocalyptic number.

It is an amenable number.

1609954144 is a deficient number, since it is larger than the sum of its proper divisors (1576252460).

1609954144 is an frugal number, since it uses more digits than its factorization.

1609954144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127 (or 782 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 1609954144 is about 40124.2338743059. The cubic root of 1609954144 is about 1172.0275904309.

The spelling of 1609954144 in words is "one billion, six hundred nine million, nine hundred fifty-four thousand, one hundred forty-four".