1291226604486 has 128 divisors (see below), whose sum is σ = 3242040754176. Its totient is φ = 333789724800.

The previous prime is 1291226604461. The next prime is 1291226604511. The reversal of 1291226604486 is 6844066221921.

It is an interprime number because it is at equal distance from previous prime (1291226604461) and next prime (1291226604511).

It is a super-2 number, since 2×1291226604486² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 5643211 + ... + 5867561.

It is an arithmetic number, because the mean of its divisors is an integer number (25328443392).

Almost surely, 2^{1291226604486} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1291226604486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1621020377088).

1291226604486 is an abundant number, since it is smaller than the sum of its proper divisors (1950814149690).

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

1291226604486 is a wasteful number, since it uses less digits than its factorization.

1291226604486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224586.

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 1291226604486 in words is "one trillion, two hundred ninety-one billion, two hundred twenty-six million, six hundred four thousand, four hundred eighty-six".