1644046061 has 16 divisors (see below), whose sum is σ = 1924466688. Its totient is φ = 1375296000.

The previous prime is 1644046057. The next prime is 1644046073. The reversal of 1644046061 is 1606404461.

It is a cyclic number.

It is not a de Polignac number, because 1644046061 - 2² = 1644046057 is a prime.

It is a super-3 number, since 3×1644046061³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1644046051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59261 + ... + 82461.

It is an arithmetic number, because the mean of its divisors is an integer number (120279168).

Almost surely, 2^1644046061 is an apocalyptic number.

It is an amenable number.

1644046061 is a deficient number, since it is larger than the sum of its proper divisors (280420627).

1644046061 is a wasteful number, since it uses less digits than its factorization.

1644046061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23452.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 1644046061 is about 40546.8378668423. The cubic root of 1644046061 is about 1180.2427110143.

The spelling of 1644046061 in words is "one billion, six hundred forty-four million, forty-six thousand, sixty-one".