1664155152 has 160 divisors (see below), whose sum is σ = 5297339520. Its totient is φ = 495936000.

The previous prime is 1664155139. The next prime is 1664155153. The reversal of 1664155152 is 2515514661.

1664155152 is a `hidden beast` number, since 1 + 6 + 641 + 5 + 5 + 1 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1664155153) 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, 287002 + ... + 292742.

It is an arithmetic number, because the mean of its divisors is an integer number (33108372).

Almost surely, 2^1664155152 is an apocalyptic number.

1664155152 is a gapful number since it is divisible by the number (12) 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 1664155152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2648669760).

1664155152 is an abundant number, since it is smaller than the sum of its proper divisors (3633184368).

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

1664155152 is a wasteful number, since it uses less digits than its factorization.

1664155152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5830 (or 5818 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The square root of 1664155152 is about 40794.0578025771. The cubic root of 1664155152 is about 1185.0352561214.

It can be divided in two parts, 1664 and 155152, that added together give a square (156816 = 396²).

The spelling of 1664155152 in words is "one billion, six hundred sixty-four million, one hundred fifty-five thousand, one hundred fifty-two".