161632246225521 has 16 divisors (see below), whose sum is σ = 236715417815040. Its totient is φ = 97645109847120.

The previous prime is 161632246225453. The next prime is 161632246225577. The reversal of 161632246225521 is 125522642236161.

It is a de Polignac number, because none of the positive numbers 2^k-161632246225521 is a prime.

It is a super-3 number, since 3×161632246225521³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (161632246225591) 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, 61644638745 + ... + 61644641366.

It is an arithmetic number, because the mean of its divisors is an integer number (14794713613440).

Almost surely, 2^{161632246225521} is an apocalyptic number.

It is an amenable number.

161632246225521 is a deficient number, since it is larger than the sum of its proper divisors (75083171589519).

161632246225521 is a wasteful number, since it uses less digits than its factorization.

161632246225521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123289280156.

The product of its digits is 2073600, while the sum is 48.

The spelling of 161632246225521 in words is "one hundred sixty-one trillion, six hundred thirty-two billion, two hundred forty-six million, two hundred twenty-five thousand, five hundred twenty-one".