2661645135 has 16 divisors (see below), whose sum is σ = 4373731296. Its totient is φ = 1381177728.

The previous prime is 2661645127. The next prime is 2661645157. The reversal of 2661645135 is 5315461662.

It is not a de Polignac number, because 2661645135 - 2³ = 2661645127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2661645093 and 2661645102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2397324 + ... + 2398433.

It is an arithmetic number, because the mean of its divisors is an integer number (273358206).

Almost surely, 2^2661645135 is an apocalyptic number.

2661645135 is a deficient number, since it is larger than the sum of its proper divisors (1712086161).

2661645135 is a wasteful number, since it uses less digits than its factorization.

2661645135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4795802.

The product of its digits is 129600, while the sum is 39.

The square root of 2661645135 is about 51591.1342674301. The cubic root of 2661645135 is about 1385.8515678661.

The spelling of 2661645135 in words is "two billion, six hundred sixty-one million, six hundred forty-five thousand, one hundred thirty-five".