1601438166 has 12 divisors (see below), whose sum is σ = 3469782732. Its totient is φ = 533812716.

The previous prime is 1601438149. The next prime is 1601438171. The reversal of 1601438166 is 6618341061.

1601438166 is a `hidden beast` number, since 1 + 60 + 1 + 438 + 166 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1601438166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44484376 + ... + 44484411.

It is an arithmetic number, because the mean of its divisors is an integer number (289148561).

Almost surely, 2^1601438166 is an apocalyptic number.

1601438166 is an abundant number, since it is smaller than the sum of its proper divisors (1868344566).

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

1601438166 is a wasteful number, since it uses less digits than its factorization.

1601438166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88968795 (or 88968792 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1601438166 is about 40017.9730371242. The cubic root of 1601438166 is about 1169.9574255821.

The spelling of 1601438166 in words is "one billion, six hundred one million, four hundred thirty-eight thousand, one hundred sixty-six".