165701687033138 has 8 divisors (see below), whose sum is σ = 248843916871788. Its totient is φ = 82753714742544.

The previous prime is 165701687033131. The next prime is 165701687033149. The reversal of 165701687033138 is 831330786107561.

It can be written as a sum of positive squares in 2 ways, for example, as 163492203969649 + 2209483063489 = 12786407^2 + 1486433^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (165701687033131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48564384881 + ... + 48564388292.

Almost surely, 2^{165701687033138} is an apocalyptic number.

165701687033138 is a deficient number, since it is larger than the sum of its proper divisors (83142229838650).

165701687033138 is an equidigital number, since it uses as much as digits as its factorization.

165701687033138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97128774028.

The product of its (nonzero) digits is 15240960, while the sum is 59.

The spelling of 165701687033138 in words is "one hundred sixty-five trillion, seven hundred one billion, six hundred eighty-seven million, thirty-three thousand, one hundred thirty-eight".