1226786616672 has 48 divisors (see below), whose sum is σ = 3221220602880. Its totient is φ = 408813858432.

The previous prime is 1226786616667. The next prime is 1226786616709. The reversal of 1226786616672 is 2766166876221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

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, 1453648 + ... + 2136975.

It is an arithmetic number, because the mean of its divisors is an integer number (67108762560).

Almost surely, 2^{1226786616672} is an apocalyptic number.

1226786616672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1226786616672 is an abundant number, since it is smaller than the sum of its proper divisors (1994433986208).

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

1226786616672 is a wasteful number, since it uses less digits than its factorization.

1226786616672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3594195 (or 3594187 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 60.

The spelling of 1226786616672 in words is "one trillion, two hundred twenty-six billion, seven hundred eighty-six million, six hundred sixteen thousand, six hundred seventy-two".