151601816165 has 16 divisors (see below), whose sum is σ = 182417414256. Its totient is φ = 120951590400.

The previous prime is 151601816161. The next prime is 151601816167. The reversal of 151601816165 is 561618106151.

It can be written as a sum of positive squares in 8 ways, for example, as 5388881281 + 146212934884 = 73409^2 + 382378^2 .

It is not a de Polignac number, because 151601816165 - 2² = 151601816161 is a prime.

It is a super-2 number, since 2×151601816165² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151601816161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4392275 + ... + 4426655.

It is an arithmetic number, because the mean of its divisors is an integer number (11401088391).

Almost surely, 2^151601816165 is an apocalyptic number.

It is an amenable number.

151601816165 is a deficient number, since it is larger than the sum of its proper divisors (30815598091).

151601816165 is a wasteful number, since it uses less digits than its factorization.

151601816165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36760.

The product of its (nonzero) digits is 43200, while the sum is 41.

The spelling of 151601816165 in words is "one hundred fifty-one billion, six hundred one million, eight hundred sixteen thousand, one hundred sixty-five".