165837290644 has 12 divisors (see below), whose sum is σ = 290228969268. Its totient is φ = 82914728000.

The previous prime is 165837290639. The next prime is 165837290687. The reversal of 165837290644 is 446092738561.

It can be written as a sum of positive squares in 2 ways, for example, as 21921763600 + 143915527044 = 148060^2 + 379362^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 883027 + ... + 1054234.

It is an arithmetic number, because the mean of its divisors is an integer number (24185747439).

It is a 1-persistent number, because it is pandigital, but 2⋅165837290644 = 331674581288 is not.

Almost surely, 2^165837290644 is an apocalyptic number.

It is an amenable number.

165837290644 is a deficient number, since it is larger than the sum of its proper divisors (124391678624).

165837290644 is a wasteful number, since it uses less digits than its factorization.

165837290644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958666 (or 1958664 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 165837290644 in words is "one hundred sixty-five billion, eight hundred thirty-seven million, two hundred ninety thousand, six hundred forty-four".