165457440449 has 8 divisors (see below), whose sum is σ = 195614708160. Its totient is φ = 136930295376.

The previous prime is 165457440443. The next prime is 165457440487. The reversal of 165457440449 is 944044754561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165457440449 - 2⁸ = 165457440193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165457440449.

It is not an unprimeable number, because it can be changed into a prime (165457440443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407530439 + ... + 407530844.

It is an arithmetic number, because the mean of its divisors is an integer number (24451838520).

Almost surely, 2^165457440449 is an apocalyptic number.

It is an amenable number.

165457440449 is a deficient number, since it is larger than the sum of its proper divisors (30157267711).

165457440449 is an equidigital number, since it uses as much as digits as its factorization.

165457440449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815061319.

The product of its (nonzero) digits is 9676800, while the sum is 53.

The spelling of 165457440449 in words is "one hundred sixty-five billion, four hundred fifty-seven million, four hundred forty thousand, four hundred forty-nine".