165612364051545 has 24 divisors (see below), whose sum is σ = 287763292744200. Its totient is φ = 88110636708096.

The previous prime is 165612364051531. The next prime is 165612364051549. The reversal of 165612364051545 is 545150463216561.

165612364051545 is a `hidden beast` number, since 1 + 6 + 5 + 6 + 1 + 2 + 3 + 6 + 40 + 51 + 545 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 104848670910096 + 60763693141449 = 10239564^2 + 7795107^2 .

It is not a de Polignac number, because 165612364051545 - 2⁸ = 165612364051289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165612364051491 and 165612364051500.

It is not an unprimeable number, because it can be changed into a prime (165612364051549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4499094990 + ... + 4499131799.

It is an arithmetic number, because the mean of its divisors is an integer number (11990137197675).

Almost surely, 2^{165612364051545} is an apocalyptic number.

165612364051545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165612364051545 is a deficient number, since it is larger than the sum of its proper divisors (122150928692655).

165612364051545 is a wasteful number, since it uses less digits than its factorization.

165612364051545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8998227209 (or 8998227206 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 54.

The spelling of 165612364051545 in words is "one hundred sixty-five trillion, six hundred twelve billion, three hundred sixty-four million, fifty-one thousand, five hundred forty-five".