2153578045 has 8 divisors (see below), whose sum is σ = 2585863224. Its totient is φ = 1721816064.

The previous prime is 2153578043. The next prime is 2153578051. The reversal of 2153578045 is 5408753512.

It can be written as a sum of positive squares in 4 ways, for example, as 2566404 + 2151011641 = 1602^2 + 46379^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2153578045 - 2¹ = 2153578043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2153577989 and 2153578007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153578043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121684 + ... + 138253.

It is an arithmetic number, because the mean of its divisors is an integer number (323232903).

Almost surely, 2^2153578045 is an apocalyptic number.

It is an amenable number.

2153578045 is a deficient number, since it is larger than the sum of its proper divisors (432285179).

2153578045 is a wasteful number, since it uses less digits than its factorization.

2153578045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261599.

The product of its (nonzero) digits is 168000, while the sum is 40.

The square root of 2153578045 is about 46406.6594897758. The cubic root of 2153578045 is about 1291.3784605866.

The spelling of 2153578045 in words is "two billion, one hundred fifty-three million, five hundred seventy-eight thousand, forty-five".