1641603648 has 56 divisors (see below), whose sum is σ = 4572020320. Its totient is φ = 518400000.

The previous prime is 1641603641. The next prime is 1641603673. The reversal of 1641603648 is 8463061461.

It is not an unprimeable number, because it can be changed into a prime (1641603641) 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, 221353 + ... + 228648.

It is an arithmetic number, because the mean of its divisors is an integer number (81643220).

Almost surely, 2^1641603648 is an apocalyptic number.

It is an amenable number.

1641603648 is an abundant number, since it is smaller than the sum of its proper divisors (2930416672).

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

1641603648 is a wasteful number, since it uses less digits than its factorization.

1641603648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450035 (or 450025 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 1641603648 is about 40516.7082572116. The cubic root of 1641603648 is about 1179.6579608093.

The spelling of 1641603648 in words is "one billion, six hundred forty-one million, six hundred three thousand, six hundred forty-eight".