165036052013421 has 16 divisors (see below), whose sum is σ = 235053950194944. Its totient is φ = 102635642962944.

The previous prime is 165036052013419. The next prime is 165036052013431. The reversal of 165036052013421 is 124310250630561.

It is a happy number.

It is not a de Polignac number, because 165036052013421 - 2¹ = 165036052013419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165036052013421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165036052013401) 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, 14318582821 + ... + 14318594346.

It is an arithmetic number, because the mean of its divisors is an integer number (14690871887184).

Almost surely, 2^{165036052013421} is an apocalyptic number.

It is an amenable number.

165036052013421 is a deficient number, since it is larger than the sum of its proper divisors (70017898181523).

165036052013421 is a wasteful number, since it uses less digits than its factorization.

165036052013421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28637177300.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 165036052013421 in words is "one hundred sixty-five trillion, thirty-six billion, fifty-two million, thirteen thousand, four hundred twenty-one".