1165099680 has 192 divisors, whose sum is σ = 4096552320. Its totient is φ = 309270528.

The previous prime is 1165099673. The next prime is 1165099681. The reversal of 1165099680 is 869905611.

It is a super-2 number, since 2×1165099680² = 2714914528672204800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1165099681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1222084 + ... + 1223036.

It is an arithmetic number, because the mean of its divisors is an integer number (21336210).

Almost surely, 2^1165099680 is an apocalyptic number.

1165099680 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 1165099680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2048276160).

1165099680 is an abundant number, since it is smaller than the sum of its proper divisors (2931452640).

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

1165099680 is a wasteful number, since it uses less digits than its factorization.

1165099680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260 (or 1246 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 1165099680 is about 34133.5565096871. The cubic root of 1165099680 is about 1052.2550717112.

The spelling of 1165099680 in words is "one billion, one hundred sixty-five million, ninety-nine thousand, six hundred eighty".