165478786188 has 12 divisors (see below), whose sum is σ = 386117167800. Its totient is φ = 55159595392.

The previous prime is 165478786177. The next prime is 165478786201. The reversal of 165478786188 is 881687874561.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6894949413 + ... + 6894949436.

It is an arithmetic number, because the mean of its divisors is an integer number (32176430650).

Almost surely, 2^165478786188 is an apocalyptic number.

It is an amenable number.

165478786188 is an abundant number, since it is smaller than the sum of its proper divisors (220638381612).

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

165478786188 is a wasteful number, since it uses less digits than its factorization.

165478786188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13789898856 (or 13789898854 counting only the distinct ones).

The product of its digits is 144506880, while the sum is 69.

The spelling of 165478786188 in words is "one hundred sixty-five billion, four hundred seventy-eight million, seven hundred eighty-six thousand, one hundred eighty-eight".