165950606400 has 168 divisors, whose sum is σ = 544657178400. Its totient is φ = 44237168640.

The previous prime is 165950606389. The next prime is 165950606461. The reversal of 165950606400 is 4606059561.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18749176 + ... + 18758024.

Almost surely, 2^165950606400 is an apocalyptic number.

165950606400 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 165950606400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272328589200).

165950606400 is an abundant number, since it is smaller than the sum of its proper divisors (378706572000).

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

165950606400 is a wasteful number, since it uses less digits than its factorization.

165950606400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12781 (or 12766 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 165950606400 in words is "one hundred sixty-five billion, nine hundred fifty million, six hundred six thousand, four hundred".