2505649663 has 8 divisors (see below), whose sum is σ = 2764149840. Its totient is φ = 2252268480.

The previous prime is 2505649661. The next prime is 2505649691. The reversal of 2505649663 is 3669465052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2505649663 - 2¹ = 2505649661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505649661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1278720 + ... + 1280677.

It is an arithmetic number, because the mean of its divisors is an integer number (345518730).

Almost surely, 2^2505649663 is an apocalyptic number.

2505649663 is a deficient number, since it is larger than the sum of its proper divisors (258500177).

2505649663 is a wasteful number, since it uses less digits than its factorization.

2505649663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559497.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The square root of 2505649663 is about 50056.4647473231. The cubic root of 2505649663 is about 1358.2304087754.

The spelling of 2505649663 in words is "two billion, five hundred five million, six hundred forty-nine thousand, six hundred sixty-three".