1165671000 has 512 divisors, whose sum is σ = 4513017600. Its totient is φ = 279936000.

The previous prime is 1165670983. The next prime is 1165671043. The reversal of 1165671000 is 1765611.

1165671000 is a `hidden beast` number, since 1 + 1 + 656 + 7 + 1 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 28430980 + ... + 28431020.

Almost surely, 2^1165671000 is an apocalyptic number.

1165671000 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 1165671000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2256508800).

1165671000 is an abundant number, since it is smaller than the sum of its proper divisors (3347346600).

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

1165671000 is an equidigital number, since it uses as much as digits as its factorization.

1165671000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 1165671000 is about 34141.9243745867. The cubic root of 1165671000 is about 1052.4270387226.

The spelling of 1165671000 in words is "one billion, one hundred sixty-five million, six hundred seventy-one thousand".