2153565794 has 4 divisors (see below), whose sum is σ = 3230348694. Its totient is φ = 1076782896.

The previous prime is 2153565793. The next prime is 2153565853. The reversal of 2153565794 is 4975653512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1320377569 + 833188225 = 36337^2 + 28865^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2153565793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538391447 + ... + 538391450.

Almost surely, 2^2153565794 is an apocalyptic number.

2153565794 is a deficient number, since it is larger than the sum of its proper divisors (1076782900).

2153565794 is a wasteful number, since it uses less digits than its factorization.

2153565794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076782899.

The product of its digits is 1134000, while the sum is 47.

The square root of 2153565794 is about 46406.5274934464. The cubic root of 2153565794 is about 1291.3760118389.

The spelling of 2153565794 in words is "two billion, one hundred fifty-three million, five hundred sixty-five thousand, seven hundred ninety-four".