1263049669820 has 12 divisors (see below), whose sum is σ = 2652404306664. Its totient is φ = 505219867920.

The previous prime is 1263049669813. The next prime is 1263049669829. The reversal of 1263049669820 is 289669403621.

It is a happy number.

It is a super-2 number, since 2×1263049669820² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263049669829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31576241726 + ... + 31576241765.

It is an arithmetic number, because the mean of its divisors is an integer number (221033692222).

Almost surely, 2^{1263049669820} is an apocalyptic number.

1263049669820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263049669820 is an abundant number, since it is smaller than the sum of its proper divisors (1389354636844).

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

1263049669820 is a wasteful number, since it uses less digits than its factorization.

1263049669820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63152483500 (or 63152483498 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 56.

The spelling of 1263049669820 in words is "one trillion, two hundred sixty-three billion, forty-nine million, six hundred sixty-nine thousand, eight hundred twenty".