165400149600 has 432 divisors, whose sum is σ = 667474778880. Its totient is φ = 37754035200.

The previous prime is 165400149599. The next prime is 165400149611. The reversal of 165400149600 is 6941004561.

165400149600 is a `hidden beast` number, since 1 + 6 + 5 + 4 + 0 + 0 + 1 + 49 + 600 = 666.

165400149600 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 46315815 + ... + 46319385.

Almost surely, 2^165400149600 is an apocalyptic number.

165400149600 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 165400149600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333737389440).

165400149600 is an abundant number, since it is smaller than the sum of its proper divisors (502074629280).

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

165400149600 is a wasteful number, since it uses less digits than its factorization.

165400149600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4523 (or 4507 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 165400149600 in words is "one hundred sixty-five billion, four hundred million, one hundred forty-nine thousand, six hundred".