1268996435778 has 16 divisors (see below), whose sum is σ = 2538573302016. Its totient is φ = 422902073520.

The previous prime is 1268996435723. The next prime is 1268996435813. The reversal of 1268996435778 is 8775346998621.

It is a super-2 number, since 2×1268996435778² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24156178 + ... + 24208653.

It is an arithmetic number, because the mean of its divisors is an integer number (158660831376).

Almost surely, 2^{1268996435778} is an apocalyptic number.

1268996435778 is an abundant number, since it is smaller than the sum of its proper divisors (1269576866238).

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

1268996435778 is a wasteful number, since it uses less digits than its factorization.

1268996435778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48369209.

The product of its digits is 1097349120, while the sum is 75.

The spelling of 1268996435778 in words is "one trillion, two hundred sixty-eight billion, nine hundred ninety-six million, four hundred thirty-five thousand, seven hundred seventy-eight".