2145140544 has 28 divisors (see below), whose sum is σ = 5675684864. Its totient is φ = 715046784.

The previous prime is 2145140509. The next prime is 2145140549. The reversal of 2145140544 is 4450415412.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145140549) 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, 5586112 + ... + 5586495.

Almost surely, 2^2145140544 is an apocalyptic number.

2145140544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2145140544 is an abundant number, since it is smaller than the sum of its proper divisors (3530544320).

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

2145140544 is a wasteful number, since it uses less digits than its factorization.

2145140544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11172622 (or 11172612 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 2145140544 is about 46315.6619730302. The cubic root of 2145140544 is about 1289.6897565328.

Adding to 2145140544 its reverse (4450415412), we get a palindrome (6595555956).

The spelling of 2145140544 in words is "two billion, one hundred forty-five million, one hundred forty thousand, five hundred forty-four".