1361212226556 has 96 divisors (see below), whose sum is σ = 4000032250368. Its totient is φ = 350652153600.

The previous prime is 1361212226551. The next prime is 1361212226597. The reversal of 1361212226556 is 6556222121631.

It is a super-2 number, since 2×1361212226556² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361212226551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14447595 + ... + 14541506.

It is an arithmetic number, because the mean of its divisors is an integer number (41667002608).

Almost surely, 2^{1361212226556} is an apocalyptic number.

It is an amenable number.

1361212226556 is an abundant number, since it is smaller than the sum of its proper divisors (2638820023812).

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

1361212226556 is a wasteful number, since it uses less digits than its factorization.

1361212226556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28989171 (or 28989169 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The spelling of 1361212226556 in words is "one trillion, three hundred sixty-one billion, two hundred twelve million, two hundred twenty-six thousand, five hundred fifty-six".