1163499778980 has 288 divisors, whose sum is σ = 4403421404928. Its totient is φ = 241586150400.

The previous prime is 1163499778979. The next prime is 1163499778993. The reversal of 1163499778980 is 898779943611.

1163499778980 is a `hidden beast` number, since 1 + 1 + 63 + 499 + 7 + 78 + 9 + 8 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1163499778899 and 1163499778908.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18999210 + ... + 19060350.

It is an arithmetic number, because the mean of its divisors is an integer number (15289657656).

Almost surely, 2^{1163499778980} is an apocalyptic number.

1163499778980 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 1163499778980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2201710702464).

1163499778980 is an abundant number, since it is smaller than the sum of its proper divisors (3239921625948).

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

1163499778980 is a wasteful number, since it uses less digits than its factorization.

1163499778980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62547 (or 62542 counting only the distinct ones).

The product of its (nonzero) digits is 164602368, while the sum is 72.

The spelling of 1163499778980 in words is "one trillion, one hundred sixty-three billion, four hundred ninety-nine million, seven hundred seventy-eight thousand, nine hundred eighty".