1641921792 has 288 divisors, whose sum is σ = 5337292800. Its totient is φ = 447068160.

The previous prime is 1641921791. The next prime is 1641921817. The reversal of 1641921792 is 2971291461.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641921791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6058617 + ... + 6058887.

Almost surely, 2^1641921792 is an apocalyptic number.

1641921792 is a gapful number since it is divisible by the number (12) 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 1641921792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2668646400).

1641921792 is an abundant number, since it is smaller than the sum of its proper divisors (3695371008).

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

1641921792 is an equidigital number, since it uses as much as digits as its factorization.

1641921792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 306 counting only the distinct ones).

The product of its digits is 54432, while the sum is 42.

The square root of 1641921792 is about 40520.6341510100. The cubic root of 1641921792 is about 1179.7341620817.

The spelling of 1641921792 in words is "one billion, six hundred forty-one million, nine hundred twenty-one thousand, seven hundred ninety-two".