2145667760 has 40 divisors (see below), whose sum is σ = 5110360416. Its totient is φ = 837332480.

The previous prime is 2145667709. The next prime is 2145667781. The reversal of 2145667760 is 677665412.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 323804 + ... + 330363.

Almost surely, 2^2145667760 is an apocalyptic number.

2145667760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145667760 is an abundant number, since it is smaller than the sum of its proper divisors (2964692656).

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

2145667760 is a wasteful number, since it uses less digits than its factorization.

2145667760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654221 (or 654215 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The square root of 2145667760 is about 46321.3531753985. The cubic root of 2145667760 is about 1289.7954045256.

The spelling of 2145667760 in words is "two billion, one hundred forty-five million, six hundred sixty-seven thousand, seven hundred sixty".