1645600050 has 120 divisors (see below), whose sum is σ = 4647984132. Its totient is φ = 431568000.

The previous prime is 1645600039. The next prime is 1645600109. The reversal of 1645600050 is 500065461.

It is a happy number.

1645600050 is a `hidden beast` number, since 1 + 6 + 4 + 5 + 600 + 0 + 50 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 542098089 + 1103501961 = 23283^2 + 33219^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1645599987 and 1645600023.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 243720 + ... + 250380.

Almost surely, 2^1645600050 is an apocalyptic number.

1645600050 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 1645600050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2323992066).

1645600050 is an abundant number, since it is smaller than the sum of its proper divisors (3002384082).

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

1645600050 is a wasteful number, since it uses less digits than its factorization.

1645600050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6746 (or 6732 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1645600050 is about 40565.9962283684. The cubic root of 1645600050 is about 1180.6144578213.

The spelling of 1645600050 in words is "one billion, six hundred forty-five million, six hundred thousand, fifty".