1263387495916 has 144 divisors (see below), whose sum is σ = 2787355905600. Its totient is φ = 496628858880.

The previous prime is 1263387495911. The next prime is 1263387495917. The reversal of 1263387495916 is 6195947833621.

It is a super-2 number, since 2×1263387495916² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1263387495911) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 584629876 + ... + 584632036.

Almost surely, 2^{1263387495916} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1263387495916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1393677952800).

1263387495916 is an abundant number, since it is smaller than the sum of its proper divisors (1523968409684).

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

1263387495916 is a wasteful number, since it uses less digits than its factorization.

1263387495916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3544 (or 3535 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 64.

The spelling of 1263387495916 in words is "one trillion, two hundred sixty-three billion, three hundred eighty-seven million, four hundred ninety-five thousand, nine hundred sixteen".