1155163042220 has 48 divisors (see below), whose sum is σ = 2648743257888. Its totient is φ = 419683138560.

The previous prime is 1155163042177. The next prime is 1155163042259. The reversal of 1155163042220 is 222403615511.

It is a super-2 number, since 2×1155163042220² (a number of 25 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 2104637 + ... + 2596116.

It is an arithmetic number, because the mean of its divisors is an integer number (55182151206).

Almost surely, 2^{1155163042220} is an apocalyptic number.

1155163042220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155163042220 is an abundant number, since it is smaller than the sum of its proper divisors (1493580215668).

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

1155163042220 is a wasteful number, since it uses less digits than its factorization.

1155163042220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4701890 (or 4701888 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 1155163042220 its reverse (222403615511), we get a palindrome (1377566657731).

The spelling of 1155163042220 in words is "one trillion, one hundred fifty-five billion, one hundred sixty-three million, forty-two thousand, two hundred twenty".