165121055524 has 12 divisors (see below), whose sum is σ = 290875502848. Its totient is φ = 82013769000.

The previous prime is 165121055467. The next prime is 165121055569. The reversal of 165121055524 is 425550121561.

It is a super-3 number, since 3×165121055524³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136689012 + ... + 136690219.

Almost surely, 2^165121055524 is an apocalyptic number.

It is an amenable number.

165121055524 is a deficient number, since it is larger than the sum of its proper divisors (125754447324).

165121055524 is a wasteful number, since it uses less digits than its factorization.

165121055524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273379386 (or 273379384 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 37.

The spelling of 165121055524 in words is "one hundred sixty-five billion, one hundred twenty-one million, fifty-five thousand, five hundred twenty-four".