2664431540 has 24 divisors (see below), whose sum is σ = 5596521000. Its totient is φ = 1065541248.

The previous prime is 2664431533. The next prime is 2664431591. The reversal of 2664431540 is 451344662.

It can be written as a sum of positive squares in 4 ways, for example, as 308494096 + 2355937444 = 17564^2 + 48538^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2664431540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103394 + ... + 126566.

It is an arithmetic number, because the mean of its divisors is an integer number (233188375).

Almost surely, 2^2664431540 is an apocalyptic number.

2664431540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2664431540 is an abundant number, since it is smaller than the sum of its proper divisors (2932089460).

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

2664431540 is a wasteful number, since it uses less digits than its factorization.

2664431540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28931 (or 28929 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 2664431540 is about 51618.1318918072. The cubic root of 2664431540 is about 1386.3350028358.

The spelling of 2664431540 in words is "two billion, six hundred sixty-four million, four hundred thirty-one thousand, five hundred forty".