2145553144 has 16 divisors (see below), whose sum is σ = 4597614000. Its totient is φ = 919522752.

The previous prime is 2145553141. The next prime is 2145553159. The reversal of 2145553144 is 4413555412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145553141) 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 3 ways as a sum of consecutive naturals, for example, 19156669 + ... + 19156780.

It is an arithmetic number, because the mean of its divisors is an integer number (287350875).

Almost surely, 2^2145553144 is an apocalyptic number.

It is an amenable number.

2145553144 is an abundant number, since it is smaller than the sum of its proper divisors (2452060856).

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

2145553144 is a wasteful number, since it uses less digits than its factorization.

2145553144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38313462 (or 38313458 counting only the distinct ones).

The product of its digits is 48000, while the sum is 34.

The square root of 2145553144 is about 46320.1159756752. The cubic root of 2145553144 is about 1289.7724382762.

The spelling of 2145553144 in words is "two billion, one hundred forty-five million, five hundred fifty-three thousand, one hundred forty-four".