1645266133 has 16 divisors (see below), whose sum is σ = 1911651840. Its totient is φ = 1386909936.

The previous prime is 1645266109. The next prime is 1645266151. The reversal of 1645266133 is 3316625461.

It is a cyclic number.

It is not a de Polignac number, because 1645266133 - 2²⁵ = 1611711701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1645266092 and 1645266101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645266533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96210 + ... + 112012.

It is an arithmetic number, because the mean of its divisors is an integer number (119478240).

Almost surely, 2^1645266133 is an apocalyptic number.

It is an amenable number.

1645266133 is a deficient number, since it is larger than the sum of its proper divisors (266385707).

1645266133 is a wasteful number, since it uses less digits than its factorization.

1645266133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16056.

The product of its digits is 77760, while the sum is 37.

The square root of 1645266133 is about 40561.8802941875. The cubic root of 1645266133 is about 1180.5345976095.

The spelling of 1645266133 in words is "one billion, six hundred forty-five million, two hundred sixty-six thousand, one hundred thirty-three".