1645041450 has 96 divisors (see below), whose sum is σ = 4412342592. Its totient is φ = 403200000.

The previous prime is 1645041449. The next prime is 1645041511. The reversal of 1645041450 is 541405461.

1645041450 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1645041450² = 5412322744436205000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 487770 + ... + 491130.

It is an arithmetic number, because the mean of its divisors is an integer number (45961902).

Almost surely, 2^1645041450 is an apocalyptic number.

1645041450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1645041450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2206171296).

1645041450 is an abundant number, since it is smaller than the sum of its proper divisors (2767301142).

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

1645041450 is a wasteful number, since it uses less digits than its factorization.

1645041450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3640 (or 3635 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1645041450 is about 40559.1105671710. The cubic root of 1645041450 is about 1180.4808559230.

The spelling of 1645041450 in words is "one billion, six hundred forty-five million, forty-one thousand, four hundred fifty".