165853103488 has 16 divisors (see below), whose sum is σ = 330410479860. Its totient is φ = 82926551680.

The previous prime is 165853103461. The next prime is 165853103497. The reversal of 165853103488 is 884301358561.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×165853103488² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 647863558 + ... + 647863813.

Almost surely, 2^165853103488 is an apocalyptic number.

It is an amenable number.

165853103488 is a deficient number, since it is larger than the sum of its proper divisors (164557376372).

165853103488 is an equidigital number, since it uses as much as digits as its factorization.

165853103488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295727385 (or 1295727373 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 52.

The spelling of 165853103488 in words is "one hundred sixty-five billion, eight hundred fifty-three million, one hundred three thousand, four hundred eighty-eight".