1163521290 has 16 divisors (see below), whose sum is σ = 2792451168. Its totient is φ = 310272336.

The previous prime is 1163521279. The next prime is 1163521321. The reversal of 1163521290 is 921253611.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 38784043 = 1163521290 / (1 + 1 + 6 + 3 + 5 + 2 + 1 + 2 + 9 + 0).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19391992 + ... + 19392051.

It is an arithmetic number, because the mean of its divisors is an integer number (174528198).

Almost surely, 2^1163521290 is an apocalyptic number.

1163521290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1163521290 is an abundant number, since it is smaller than the sum of its proper divisors (1628929878).

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

1163521290 is a wasteful number, since it uses less digits than its factorization.

1163521290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38784053.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 1163521290 is about 34110.4278777033. The cubic root of 1163521290 is about 1051.7796847884.

The spelling of 1163521290 in words is "one billion, one hundred sixty-three million, five hundred twenty-one thousand, two hundred ninety".