1291848985774 has 4 divisors (see below), whose sum is σ = 1937773478664. Its totient is φ = 645924492886.

The previous prime is 1291848985771. The next prime is 1291848985781. The reversal of 1291848985774 is 4775898481921.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1291848985697 and 1291848985706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291848985771) 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 as a sum of consecutive naturals, namely, 322962246442 + ... + 322962246445.

It is an arithmetic number, because the mean of its divisors is an integer number (484443369666).

Almost surely, 2^{1291848985774} is an apocalyptic number.

1291848985774 is a deficient number, since it is larger than the sum of its proper divisors (645924492890).

1291848985774 is an equidigital number, since it uses as much as digits as its factorization.

1291848985774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645924492889.

The product of its digits is 325140480, while the sum is 73.

The spelling of 1291848985774 in words is "one trillion, two hundred ninety-one billion, eight hundred forty-eight million, nine hundred eighty-five thousand, seven hundred seventy-four".