1263810513 has 16 divisors (see below), whose sum is σ = 1935790976. Its totient is φ = 718433280.

The previous prime is 1263810461. The next prime is 1263810521. The reversal of 1263810513 is 3150183621.

It is not a de Polignac number, because 1263810513 - 2⁹ = 1263810001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1263810553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151858 + ... + 159963.

It is an arithmetic number, because the mean of its divisors is an integer number (120986936).

Almost surely, 2^1263810513 is an apocalyptic number.

It is an amenable number.

1263810513 is a deficient number, since it is larger than the sum of its proper divisors (671980463).

1263810513 is a wasteful number, since it uses less digits than its factorization.

1263810513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312024.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1263810513 is about 35550.1127002433. The cubic root of 1263810513 is about 1081.1700034682.

The spelling of 1263810513 in words is "one billion, two hundred sixty-three million, eight hundred ten thousand, five hundred thirteen".