1641421144 has 32 divisors (see below), whose sum is σ = 3385221840. Its totient is φ = 746095680.

The previous prime is 1641421129. The next prime is 1641421147. The reversal of 1641421144 is 4411241461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641421147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66429 + ... + 87724.

Almost surely, 2^1641421144 is an apocalyptic number.

It is an amenable number.

1641421144 is an abundant number, since it is smaller than the sum of its proper divisors (1743800696).

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

1641421144 is a wasteful number, since it uses less digits than its factorization.

1641421144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154192 (or 154166 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 1641421144 is about 40514.4559879557. The cubic root of 1641421144 is about 1179.6142433392.

The spelling of 1641421144 in words is "one billion, six hundred forty-one million, four hundred twenty-one thousand, one hundred forty-four".