2699805640 has 128 divisors (see below), whose sum is σ = 7158470400. Its totient is φ = 897039360.

The previous prime is 2699805613. The next prime is 2699805653. The reversal of 2699805640 is 465089962.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4361251 + ... + 4361869.

It is an arithmetic number, because the mean of its divisors is an integer number (55925550).

Almost surely, 2^2699805640 is an apocalyptic number.

2699805640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2699805640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3579235200).

2699805640 is an abundant number, since it is smaller than the sum of its proper divisors (4458664760).

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

2699805640 is a wasteful number, since it uses less digits than its factorization.

2699805640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095 (or 1091 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The square root of 2699805640 is about 51959.6539634359. The cubic root of 2699805640 is about 1392.4432367189.

The spelling of 2699805640 in words is "two billion, six hundred ninety-nine million, eight hundred five thousand, six hundred forty".