165256516 has 6 divisors (see below), whose sum is σ = 289198910. Its totient is φ = 82628256.

The previous prime is 165256513. The next prime is 165256543. The reversal of 165256516 is 615652561.

165256516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 137124100 + 28132416 = 11710^2 + 5304^2 .

It is not an unprimeable number, because it can be changed into a prime (165256513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20657061 + ... + 20657068.

Almost surely, 2^165256516 is an apocalyptic number.

It is an amenable number.

165256516 is a deficient number, since it is larger than the sum of its proper divisors (123942394).

165256516 is a wasteful number, since it uses less digits than its factorization.

165256516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41314133 (or 41314131 counting only the distinct ones).

The product of its digits is 54000, while the sum is 37.

The square root of 165256516 is about 12855.2135727105. The cubic root of 165256516 is about 548.7647385100.

The spelling of 165256516 in words is "one hundred sixty-five million, two hundred fifty-six thousand, five hundred sixteen".