2513763649 has 4 divisors (see below), whose sum is σ = 2538652500. Its totient is φ = 2488874800.

The previous prime is 2513763641. The next prime is 2513763661. The reversal of 2513763649 is 9463673152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1953021249 + 560742400 = 44193^2 + 23680^2 .

It is a cyclic number.

It is not a de Polignac number, because 2513763649 - 2³ = 2513763641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2513763599 and 2513763608.

It is not an unprimeable number, because it can be changed into a prime (2513763641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12444274 + ... + 12444475.

It is an arithmetic number, because the mean of its divisors is an integer number (634663125).

Almost surely, 2^2513763649 is an apocalyptic number.

It is an amenable number.

2513763649 is a deficient number, since it is larger than the sum of its proper divisors (24888851).

2513763649 is a wasteful number, since it uses less digits than its factorization.

2513763649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24888850.

The product of its digits is 816480, while the sum is 46.

The square root of 2513763649 is about 50137.4475716505. The cubic root of 2513763649 is about 1359.6949375236.

It can be divided in two parts, 251376 and 3649, that added together give a square (255025 = 505²).

The spelling of 2513763649 in words is "two billion, five hundred thirteen million, seven hundred sixty-three thousand, six hundred forty-nine".