2661528099 has 32 divisors (see below), whose sum is σ = 3838855680. Its totient is φ = 1635189248.

The previous prime is 2661528073. The next prime is 2661528169. The reversal of 2661528099 is 9908251662.

2661528099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 51590²-1.

It is a cyclic number.

It is not a de Polignac number, because 2661528099 - 2¹³ = 2661519907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2661528029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1185472 + ... + 1187714.

It is an arithmetic number, because the mean of its divisors is an integer number (119964240).

Almost surely, 2^2661528099 is an apocalyptic number.

2661528099 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2661528099 is a deficient number, since it is larger than the sum of its proper divisors (1177327581).

2661528099 is a wasteful number, since it uses less digits than its factorization.

2661528099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 2661528099 is about 51589.9999903082. Note that the first 5 decimals coincide. The cubic root of 2661528099 is about 1385.8312550028.

The spelling of 2661528099 in words is "two billion, six hundred sixty-one million, five hundred twenty-eight thousand, ninety-nine".