2145440653 has 8 divisors (see below), whose sum is σ = 2221779456. Its totient is φ = 2069547600.

The previous prime is 2145440641. The next prime is 2145440657. The reversal of 2145440653 is 3560445412.

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

It is not a de Polignac number, because 2145440653 - 2²⁵ = 2111886221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145440657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101626 + ... + 120907.

It is an arithmetic number, because the mean of its divisors is an integer number (277722432).

Almost surely, 2^2145440653 is an apocalyptic number.

It is an amenable number.

2145440653 is a deficient number, since it is larger than the sum of its proper divisors (76338803).

2145440653 is a wasteful number, since it uses less digits than its factorization.

2145440653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222875.

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 2145440653 is about 46318.9016817109. The cubic root of 2145440653 is about 1289.7498970297.

The spelling of 2145440653 in words is "two billion, one hundred forty-five million, four hundred forty thousand, six hundred fifty-three".