1641404004 has 48 divisors (see below), whose sum is σ = 3934707840. Its totient is φ = 532245760.

The previous prime is 1641403997. The next prime is 1641404021. The reversal of 1641404004 is 4004041461.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171982 + ... + 181274.

It is an arithmetic number, because the mean of its divisors is an integer number (81973080).

Almost surely, 2^1641404004 is an apocalyptic number.

It is an amenable number.

1641404004 is an abundant number, since it is smaller than the sum of its proper divisors (2293303836).

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

1641404004 is a wasteful number, since it uses less digits than its factorization.

1641404004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9700 (or 9698 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 1641404004 is about 40514.2444579681. The cubic root of 1641404004 is about 1179.6101374137.

Adding to 1641404004 its reverse (4004041461), we get a palindrome (5645445465).

The spelling of 1641404004 in words is "one billion, six hundred forty-one million, four hundred four thousand, four".