1230621923556 has 243 divisors, whose sum is σ = 3387087341001. Its totient is φ = 376676578368.

The previous prime is 1230621923551. The next prime is 1230621923681. The reversal of 1230621923556 is 6553291260321.

The square root of 1230621923556 is 1109334.

It is a perfect power (a square), and thus also a powerful number.

1230621923556 is a `hidden beast` number, since 1 + 2 + 3 + 0 + 6 + 2 + 1 + 92 + 3 + 556 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1101177396900 + 129444526656 = 1049370^2 + 359784^2 .

It is not an unprimeable number, because it can be changed into a prime (1230621923551) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 4679170681 + ... + 4679170943.

Almost surely, 2^{1230621923556} is an apocalyptic number.

1230621923556 is the 1109334-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1230621923556

1230621923556 is an abundant number, since it is smaller than the sum of its proper divisors (2156465417445).

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

1230621923556 is a wasteful number, since it uses less digits than its factorization.

1230621923556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 1230621923556 in words is "one trillion, two hundred thirty billion, six hundred twenty-one million, nine hundred twenty-three thousand, five hundred fifty-six".