165220663356442 has 16 divisors (see below), whose sum is σ = 258679911952512. Its totient is φ = 78996072046320.

The previous prime is 165220663356433. The next prime is 165220663356451. The reversal of 165220663356442 is 244653366022561.

165220663356442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (165220663356433) and next prime (165220663356451).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511338573 + ... + 511661584.

It is an arithmetic number, because the mean of its divisors is an integer number (16167494497032).

Almost surely, 2^{165220663356442} is an apocalyptic number.

165220663356442 is a deficient number, since it is larger than the sum of its proper divisors (93459248596070).

165220663356442 is a wasteful number, since it uses less digits than its factorization.

165220663356442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023003693.

The product of its (nonzero) digits is 37324800, while the sum is 55.

The spelling of 165220663356442 in words is "one hundred sixty-five trillion, two hundred twenty billion, six hundred sixty-three million, three hundred fifty-six thousand, four hundred forty-two".