1165510500 has 192 divisors, whose sum is σ = 4231858176. Its totient is φ = 242160000.

The previous prime is 1165510499. The next prime is 1165510517. The reversal of 1165510500 is 50155611.

It is a super-2 number, since 2×1165510500² = 2716829451220500000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 110455 + ... + 120545.

It is an arithmetic number, because the mean of its divisors is an integer number (22040928).

Almost surely, 2^1165510500 is an apocalyptic number.

1165510500 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 1165510500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2115929088).

1165510500 is an abundant number, since it is smaller than the sum of its proper divisors (3066347676).

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

1165510500 is a wasteful number, since it uses less digits than its factorization.

1165510500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10131 (or 10119 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 1165510500 is about 34139.5738110481. The cubic root of 1165510500 is about 1052.3787339857.

It can be divided in two parts, 11655 and 10500, that added together give a triangular number (22155 = T₂₁₀).

The spelling of 1165510500 in words is "one billion, one hundred sixty-five million, five hundred ten thousand, five hundred".