1641201504 has 96 divisors (see below), whose sum is σ = 4468875264. Its totient is φ = 526832640.

The previous prime is 1641201493. The next prime is 1641201509. The reversal of 1641201504 is 4051021461.

It is a happy number.

1641201504 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641201509) 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, 662412 + ... + 664884.

It is an arithmetic number, because the mean of its divisors is an integer number (46550784).

Almost surely, 2^1641201504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641201504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2234437632).

1641201504 is an abundant number, since it is smaller than the sum of its proper divisors (2827673760).

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

1641201504 is a wasteful number, since it uses less digits than its factorization.

1641201504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740 (or 2732 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1641201504 is about 40511.7452598626. The cubic root of 1641201504 is about 1179.5616259207.

Adding to 1641201504 its reverse (4051021461), we get a palindrome (5692222965).

The spelling of 1641201504 in words is "one billion, six hundred forty-one million, two hundred one thousand, five hundred four".