165136631562 has 36 divisors (see below), whose sum is σ = 416211716466. Its totient is φ = 47181894480.

The previous prime is 165136631537. The next prime is 165136631587. The reversal of 165136631562 is 265136631561.

It is a happy number.

165136631562 is a `hidden beast` number, since 1 + 6 + 5 + 1 + 3 + 6 + 631 + 5 + 6 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (165136631537) and next prime (165136631587).

It can be written as a sum of positive squares in only one way, i.e., 148025637081 + 17110994481 = 384741^2 + 130809^2 .

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 93613989 + ... + 93615752.

Almost surely, 2^165136631562 is an apocalyptic number.

165136631562 is an abundant number, since it is smaller than the sum of its proper divisors (251075084904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165136631562 is a wasteful number, since it uses less digits than its factorization.

165136631562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187229763 (or 187229753 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

Subtracting 165136631562 from its reverse (265136631561), we obtain a palindrome (99999999999).

The spelling of 165136631562 in words is "one hundred sixty-five billion, one hundred thirty-six million, six hundred thirty-one thousand, five hundred sixty-two".