165245612413 has 6 divisors (see below), whose sum is σ = 192224487966. Its totient is φ = 141639096312.

The previous prime is 165245612377. The next prime is 165245612423. The reversal of 165245612413 is 314216542561.

It can be written as a sum of positive squares in only one way, i.e., 157785317284 + 7460295129 = 397222^2 + 86373^2 .

It is not a de Polignac number, because 165245612413 - 2¹⁷ = 165245481341 is a prime.

It is a super-3 number, since 3×165245612413³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165245612423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1686179670 + ... + 1686179767.

It is an arithmetic number, because the mean of its divisors is an integer number (32037414661).

Almost surely, 2^165245612413 is an apocalyptic number.

It is an amenable number.

165245612413 is a deficient number, since it is larger than the sum of its proper divisors (26978875553).

165245612413 is an equidigital number, since it uses as much as digits as its factorization.

165245612413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372359451 (or 3372359444 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The spelling of 165245612413 in words is "one hundred sixty-five billion, two hundred forty-five million, six hundred twelve thousand, four hundred thirteen".