1645099092 has 192 divisors, whose sum is σ = 5323548160. Its totient is φ = 427742208.

The previous prime is 1645099091. The next prime is 1645099109. The reversal of 1645099092 is 2909905461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645099091) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 716298 + ... + 718590.

Almost surely, 2^1645099092 is an apocalyptic number.

1645099092 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 1645099092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2661774080).

1645099092 is an abundant number, since it is smaller than the sum of its proper divisors (3678449068).

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

1645099092 is a wasteful number, since it uses less digits than its factorization.

1645099092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2399 (or 2391 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 1645099092 is about 40559.8211534518. The cubic root of 1645099092 is about 1180.4946437180.

The spelling of 1645099092 in words is "one billion, six hundred forty-five million, ninety-nine thousand, ninety-two".