2145135880 has 16 divisors (see below), whose sum is σ = 4826555820. Its totient is φ = 858054336.

The previous prime is 2145135857. The next prime is 2145135899. The reversal of 2145135880 is 885315412.

It can be written as a sum of positive squares in 2 ways, for example, as 1816293924 + 328841956 = 42618^2 + 18134^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 26814159 + ... + 26814238.

Almost surely, 2^2145135880 is an apocalyptic number.

2145135880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145135880 is an abundant number, since it is smaller than the sum of its proper divisors (2681419940).

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

2145135880 is a wasteful number, since it uses less digits than its factorization.

2145135880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53628408 (or 53628404 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 2145135880 is about 46315.6116228643. The cubic root of 2145135880 is about 1289.6888218438.

The spelling of 2145135880 in words is "two billion, one hundred forty-five million, one hundred thirty-five thousand, eight hundred eighty".