1641401544 has 64 divisors (see below), whose sum is σ = 4450904640. Its totient is φ = 502384640.

The previous prime is 1641401543. The next prime is 1641401549. The reversal of 1641401544 is 4451041461.

It is not an unprimeable number, because it can be changed into a prime (1641401543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32334 + ... + 65789.

It is an arithmetic number, because the mean of its divisors is an integer number (69545385).

Almost surely, 2^1641401544 is an apocalyptic number.

It is an amenable number.

1641401544 is an abundant number, since it is smaller than the sum of its proper divisors (2809503096).

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

1641401544 is a wasteful number, since it uses less digits than its factorization.

1641401544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98190 (or 98186 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 1641401544 is about 40514.2140982643. The cubic root of 1641401544 is about 1179.6095481129.

The spelling of 1641401544 in words is "one billion, six hundred forty-one million, four hundred one thousand, five hundred forty-four".