1641372320 has 96 divisors (see below), whose sum is σ = 4494341376. Its totient is φ = 554803200.

The previous prime is 1641372319. The next prime is 1641372329. The reversal of 1641372320 is 232731461.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1641372329) 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, 69200 + ... + 89840.

It is an arithmetic number, because the mean of its divisors is an integer number (46816056).

Almost surely, 2^1641372320 is an apocalyptic number.

1641372320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641372320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2247170688).

1641372320 is an abundant number, since it is smaller than the sum of its proper divisors (2852969056).

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

1641372320 is a wasteful number, since it uses less digits than its factorization.

1641372320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20734 (or 20726 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 1641372320 is about 40513.8534331159. The cubic root of 1641372320 is about 1179.6025473652.

The spelling of 1641372320 in words is "one billion, six hundred forty-one million, three hundred seventy-two thousand, three hundred twenty".