1263564516 has 12 divisors (see below), whose sum is σ = 2948317232. Its totient is φ = 421188168.

The previous prime is 1263564509. The next prime is 1263564517. The reversal of 1263564516 is 6154653621.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1263564517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52648510 + ... + 52648533.

Almost surely, 2^1263564516 is an apocalyptic number.

It is an amenable number.

1263564516 is an abundant number, since it is smaller than the sum of its proper divisors (1684752716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1263564516 is a wasteful number, since it uses less digits than its factorization.

1263564516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105297050 (or 105297048 counting only the distinct ones).

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

The square root of 1263564516 is about 35546.6526694146. The cubic root of 1263564516 is about 1081.0998500624.

The spelling of 1263564516 in words is "one billion, two hundred sixty-three million, five hundred sixty-four thousand, five hundred sixteen".