1161117500 has 30 divisors (see below), whose sum is σ = 2539137216. Its totient is φ = 464446000.

The previous prime is 1161117491. The next prime is 1161117509. The reversal of 1161117500 is 57111611.

It is an interprime number because it is at equal distance from previous prime (1161117491) and next prime (1161117509).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161117509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 229724 + ... + 234723.

Almost surely, 2^1161117500 is an apocalyptic number.

1161117500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161117500 is an abundant number, since it is smaller than the sum of its proper divisors (1378019716).

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

1161117500 is an equidigital number, since it uses as much as digits as its factorization.

1161117500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464471 (or 464454 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 23.

The square root of 1161117500 is about 34075.1742475369. The cubic root of 1161117500 is about 1051.0548733603.

The spelling of 1161117500 in words is "one billion, one hundred sixty-one million, one hundred seventeen thousand, five hundred".