165625510621552 has 10 divisors (see below), whose sum is σ = 320899426829288. Its totient is φ = 82812755310768.

The previous prime is 165625510621427. The next prime is 165625510621561. The reversal of 165625510621552 is 255126015526561.

165625510621552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 165625510621552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5175797206908 + ... + 5175797206939.

Almost surely, 2^{165625510621552} is an apocalyptic number.

It is an amenable number.

165625510621552 is a deficient number, since it is larger than the sum of its proper divisors (155273916207736).

165625510621552 is a wasteful number, since it uses less digits than its factorization.

165625510621552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10351594413855 (or 10351594413849 counting only the distinct ones).

The product of its (nonzero) digits is 5400000, while the sum is 52.

The spelling of 165625510621552 in words is "one hundred sixty-five trillion, six hundred twenty-five billion, five hundred ten million, six hundred twenty-one thousand, five hundred fifty-two".