165188742 has 32 divisors (see below), whose sum is σ = 336213504. Its totient is φ = 54096000.

The previous prime is 165188741. The next prime is 165188743. The reversal of 165188742 is 247881561.

It is an interprime number because it is at equal distance from previous prime (165188741) and next prime (165188743).

It is a junction number, because it is equal to n+sod(n) for n = 165188694 and 165188703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165188741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170343 + ... + 171309.

It is an arithmetic number, because the mean of its divisors is an integer number (10506672).

Almost surely, 2^165188742 is an apocalyptic number.

165188742 is an abundant number, since it is smaller than the sum of its proper divisors (171024762).

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

165188742 is a wasteful number, since it uses less digits than its factorization.

165188742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444.

The product of its digits is 107520, while the sum is 42.

The square root of 165188742 is about 12852.5772512753. The cubic root of 165188742 is about 548.6897095635.

The spelling of 165188742 in words is "one hundred sixty-five million, one hundred eighty-eight thousand, seven hundred forty-two".