1238966556156 has 192 divisors, whose sum is σ = 3719142604800. Its totient is φ = 349353321408.

The previous prime is 1238966556119. The next prime is 1238966556161. The reversal of 1238966556156 is 6516556698321.

It is a happy number.

1238966556156 is a `hidden beast` number, since 1 + 2 + 3 + 8 + 9 + 6 + 6 + 5 + 5 + 615 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 1238966556093 and 1238966556102.

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, 224977555 + ... + 224983061.

It is an arithmetic number, because the mean of its divisors is an integer number (19370534400).

Almost surely, 2^{1238966556156} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1238966556156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1859571302400).

1238966556156 is an abundant number, since it is smaller than the sum of its proper divisors (2480176048644).

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

1238966556156 is a wasteful number, since it uses less digits than its factorization.

1238966556156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9373 (or 9365 counting only the distinct ones).

The product of its digits is 69984000, while the sum is 63.

The spelling of 1238966556156 in words is "one trillion, two hundred thirty-eight billion, nine hundred sixty-six million, five hundred fifty-six thousand, one hundred fifty-six".