165252605961 has 8 divisors (see below), whose sum is σ = 222608321824. Its totient is φ = 109032647040.

The previous prime is 165252605951. The next prime is 165252605983. The reversal of 165252605961 is 169506252561.

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

It is not a de Polignac number, because 165252605961 - 2²⁶ = 165185497097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165252605961.

It is not an unprimeable number, because it can be changed into a prime (165252605911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283938895 + ... + 283939476.

It is an arithmetic number, because the mean of its divisors is an integer number (27826040228).

Almost surely, 2^165252605961 is an apocalyptic number.

It is an amenable number.

165252605961 is a deficient number, since it is larger than the sum of its proper divisors (57355715863).

165252605961 is an equidigital number, since it uses as much as digits as its factorization.

165252605961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567878471.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 165252605961 in words is "one hundred sixty-five billion, two hundred fifty-two million, six hundred five thousand, nine hundred sixty-one".