1291804142780 has 24 divisors (see below), whose sum is σ = 2800298014080. Its totient is φ = 500053216320.

The previous prime is 1291804142693. The next prime is 1291804142821. The reversal of 1291804142780 is 872414081921.

It is a happy number.

It is a super-2 number, since 2×1291804142780² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 1041776915 + ... + 1041778154.

It is an arithmetic number, because the mean of its divisors is an integer number (116679083920).

Almost surely, 2^{1291804142780} is an apocalyptic number.

1291804142780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1291804142780 is an abundant number, since it is smaller than the sum of its proper divisors (1508493871300).

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

1291804142780 is a wasteful number, since it uses less digits than its factorization.

1291804142780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083555109 (or 2083555107 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 47.

The spelling of 1291804142780 in words is "one trillion, two hundred ninety-one billion, eight hundred four million, one hundred forty-two thousand, seven hundred eighty".