1226831500656 has 160 divisors (see below), whose sum is σ = 3554772480000. Its totient is φ = 405088653312.

The previous prime is 1226831500619. The next prime is 1226831500663. The reversal of 1226831500656 is 6560051386221.

1226831500656 is a `hidden beast` number, since 1 + 2 + 2 + 6 + 83 + 1 + 500 + 65 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26938801 + ... + 26984303.

It is an arithmetic number, because the mean of its divisors is an integer number (22217328000).

Almost surely, 2^{1226831500656} is an apocalyptic number.

1226831500656 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 1226831500656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1777386240000).

1226831500656 is an abundant number, since it is smaller than the sum of its proper divisors (2327940979344).

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

1226831500656 is a wasteful number, since it uses less digits than its factorization.

1226831500656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46108 (or 46096 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

Adding to 1226831500656 its reverse (6560051386221), we get a palindrome (7786882886877).

The spelling of 1226831500656 in words is "one trillion, two hundred twenty-six billion, eight hundred thirty-one million, five hundred thousand, six hundred fifty-six".