1641554128 has 10 divisors (see below), whose sum is σ = 3180511154. Its totient is φ = 820777056.

The previous prime is 1641554063. The next prime is 1641554141. The reversal of 1641554128 is 8214551461.

It can be written as a sum of positive squares in only one way, i.e., 1318561344 + 322992784 = 36312^2 + 17972^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51298551 + ... + 51298582.

Almost surely, 2^1641554128 is an apocalyptic number.

It is an amenable number.

1641554128 is a deficient number, since it is larger than the sum of its proper divisors (1538957026).

1641554128 is a wasteful number, since it uses less digits than its factorization.

1641554128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102597141 (or 102597135 counting only the distinct ones).

The product of its digits is 38400, while the sum is 37.

The square root of 1641554128 is about 40516.0971466897. The cubic root of 1641554128 is about 1179.6460989835.

The spelling of 1641554128 in words is "one billion, six hundred forty-one million, five hundred fifty-four thousand, one hundred twenty-eight".