1163280310920 has 1280 divisors, whose sum is σ = 5009079398400. Its totient is φ = 235534417920.

The previous prime is 1163280310867. The next prime is 1163280310921. The reversal of 1163280310920 is 290130823611.

1163280310920 is a `hidden beast` number, since 1 + 1 + 63 + 280 + 310 + 9 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1163280310921) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 1252185016 + ... + 1252185944.

It is an arithmetic number, because the mean of its divisors is an integer number (3913343280).

Almost surely, 2^{1163280310920} is an apocalyptic number.

1163280310920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1163280310920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2504539699200).

1163280310920 is an abundant number, since it is smaller than the sum of its proper divisors (3845799087480).

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

1163280310920 is a wasteful number, since it uses less digits than its factorization.

1163280310920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 1163280310920 in words is "one trillion, one hundred sixty-three billion, two hundred eighty million, three hundred ten thousand, nine hundred twenty".