1263901263889 has 16 divisors (see below), whose sum is σ = 1393355658240. Its totient is φ = 1136878364160.

The previous prime is 1263901263857. The next prime is 1263901263899. The reversal of 1263901263889 is 9883621093621.

It is not a de Polignac number, because 1263901263889 - 2⁵ = 1263901263857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1263901263899) 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, 4295247 + ... + 4580059.

It is an arithmetic number, because the mean of its divisors is an integer number (87084728640).

Almost surely, 2^{1263901263889} is an apocalyptic number.

It is an amenable number.

1263901263889 is a deficient number, since it is larger than the sum of its proper divisors (129454394351).

1263901263889 is a wasteful number, since it uses less digits than its factorization.

1263901263889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289080.

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 1263901263889 in words is "one trillion, two hundred sixty-three billion, nine hundred one million, two hundred sixty-three thousand, eight hundred eighty-nine".