1641736944 has 80 divisors (see below), whose sum is σ = 4717232800. Its totient is φ = 546683904.

The previous prime is 1641736919. The next prime is 1641736997. The reversal of 1641736944 is 4496371461.

It is a self number, because there is not a number n which added to its sum of digits gives 1641736944.

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, 808122 + ... + 810150.

It is an arithmetic number, because the mean of its divisors is an integer number (58965410).

Almost surely, 2^1641736944 is an apocalyptic number.

It is an amenable number.

1641736944 is an abundant number, since it is smaller than the sum of its proper divisors (3075495856).

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

1641736944 is a wasteful number, since it uses less digits than its factorization.

1641736944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3919 (or 3907 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 1641736944 is about 40518.3531748268. The cubic root of 1641736944 is about 1179.6898888231.

It can be divided in two parts, 16417 and 36944, that added together give a square (53361 = 231²).

The spelling of 1641736944 in words is "one billion, six hundred forty-one million, seven hundred thirty-six thousand, nine hundred forty-four".