2615661745 has 16 divisors (see below), whose sum is σ = 3174353280. Its totient is φ = 2068867584.

The previous prime is 2615661739. The next prime is 2615661767. The reversal of 2615661745 is 5471665162.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2615661745 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 629886 + ... + 634024.

It is an arithmetic number, because the mean of its divisors is an integer number (198397080).

Almost surely, 2^2615661745 is an apocalyptic number.

It is an amenable number.

2615661745 is a deficient number, since it is larger than the sum of its proper divisors (558691535).

2615661745 is a wasteful number, since it uses less digits than its factorization.

2615661745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5544.

The product of its digits is 302400, while the sum is 43.

The square root of 2615661745 is about 51143.5405989847. The cubic root of 2615661745 is about 1377.8243644654.

The spelling of 2615661745 in words is "two billion, six hundred fifteen million, six hundred sixty-one thousand, seven hundred forty-five".