165626646142 has 4 divisors (see below), whose sum is σ = 248439969216. Its totient is φ = 82813323070.

The previous prime is 165626646139. The next prime is 165626646161. The reversal of 165626646142 is 241646626561.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41406661534 + ... + 41406661537.

It is an arithmetic number, because the mean of its divisors is an integer number (62109992304).

Almost surely, 2^165626646142 is an apocalyptic number.

165626646142 is a deficient number, since it is larger than the sum of its proper divisors (82813323074).

165626646142 is an equidigital number, since it uses as much as digits as its factorization.

165626646142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82813323073.

The product of its digits is 2488320, while the sum is 49.

The spelling of 165626646142 in words is "one hundred sixty-five billion, six hundred twenty-six million, six hundred forty-six thousand, one hundred forty-two".