165603413250 has 384 divisors, whose sum is σ = 534561431040. Its totient is φ = 37781568000.

The previous prime is 165603413243. The next prime is 165603413263. The reversal of 165603413250 is 52314306561.

165603413250 is a `hidden beast` number, since 1 + 6 + 5 + 60 + 341 + 3 + 250 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 13878787 + ... + 13890713.

It is an arithmetic number, because the mean of its divisors is an integer number (1392087060).

Almost surely, 2^165603413250 is an apocalyptic number.

165603413250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 165603413250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267280715520).

165603413250 is an abundant number, since it is smaller than the sum of its proper divisors (368958017790).

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

165603413250 is a wasteful number, since it uses less digits than its factorization.

165603413250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11992 (or 11965 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 165603413250 in words is "one hundred sixty-five billion, six hundred three million, four hundred thirteen thousand, two hundred fifty".