1163390206956 has 96 divisors (see below), whose sum is σ = 2907216076800. Its totient is φ = 360993568320.

The previous prime is 1163390206931. The next prime is 1163390206991. The reversal of 1163390206956 is 6596020933611.

It is a happy number.

It is a super-2 number, since 2×1163390206956² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1163390206899 and 1163390206908.

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, 31068861 + ... + 31106283.

It is an arithmetic number, because the mean of its divisors is an integer number (30283500800).

Almost surely, 2^{1163390206956} 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 1163390206956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1453608038400).

1163390206956 is an abundant number, since it is smaller than the sum of its proper divisors (1743825869844).

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

1163390206956 is a wasteful number, since it uses less digits than its factorization.

1163390206956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39819 (or 39817 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 51.

The spelling of 1163390206956 in words is "one trillion, one hundred sixty-three billion, three hundred ninety million, two hundred six thousand, nine hundred fifty-six".