1291003773696 has 648 divisors, whose sum is σ = 4624288171776. Its totient is φ = 339166863360.

The previous prime is 1291003773643. The next prime is 1291003773727. The reversal of 1291003773696 is 6963773001921.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 847670791 + ... + 847672313.

Almost surely, 2^{1291003773696} is an apocalyptic number.

1291003773696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1291003773696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2312144085888).

1291003773696 is an abundant number, since it is smaller than the sum of its proper divisors (3333284398080).

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

1291003773696 is a wasteful number, since it uses less digits than its factorization.

1291003773696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889 (or 1859 counting only the distinct ones).

The product of its (nonzero) digits is 2571912, while the sum is 54.

The spelling of 1291003773696 in words is "one trillion, two hundred ninety-one billion, three million, seven hundred seventy-three thousand, six hundred ninety-six".