1645075770 has 64 divisors (see below), whose sum is σ = 4303200384. Its totient is φ = 400055040.

The previous prime is 1645075753. The next prime is 1645075777. The reversal of 1645075770 is 775705461.

1645075770 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1645075777) 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, 6960 + ... + 57780.

It is an arithmetic number, because the mean of its divisors is an integer number (67237506).

Almost surely, 2^1645075770 is an apocalyptic number.

1645075770 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 1645075770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2151600192).

1645075770 is an abundant number, since it is smaller than the sum of its proper divisors (2658124614).

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

1645075770 is a wasteful number, since it uses less digits than its factorization.

1645075770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50927.

The product of its (nonzero) digits is 205800, while the sum is 42.

The square root of 1645075770 is about 40559.5336511652. The cubic root of 1645075770 is about 1180.4890652037.

The spelling of 1645075770 in words is "one billion, six hundred forty-five million, seventy-five thousand, seven hundred seventy".