166143154450 has 96 divisors (see below), whose sum is σ = 400358125440. Its totient is φ = 49814092800.

The previous prime is 166143154421. The next prime is 166143154477. The reversal of 166143154450 is 54451341661.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 874471 + ... + 1047370.

It is an arithmetic number, because the mean of its divisors is an integer number (4170397140).

Almost surely, 2^166143154450 is an apocalyptic number.

166143154450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166143154450 is an abundant number, since it is smaller than the sum of its proper divisors (234214970990).

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

166143154450 is a wasteful number, since it uses less digits than its factorization.

166143154450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921892 (or 1921887 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 166143154450 in words is "one hundred sixty-six billion, one hundred forty-three million, one hundred fifty-four thousand, four hundred fifty".