161606601511548 has 24 divisors (see below), whose sum is σ = 377110848860928. Its totient is φ = 53864755932336.

The previous prime is 161606601511543. The next prime is 161606601511561. The reversal of 161606601511548 is 845115106606161.

It is a super-2 number, since 2×161606601511548² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161606601511548.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161606601511541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513740986 + ... + 514055457.

It is an arithmetic number, because the mean of its divisors is an integer number (15712952035872).

Almost surely, 2^{161606601511548} is an apocalyptic number.

It is an amenable number.

161606601511548 is an abundant number, since it is smaller than the sum of its proper divisors (215504247349380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161606601511548 is a wasteful number, since it uses less digits than its factorization.

161606601511548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027809553 (or 1027809551 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 51.

The spelling of 161606601511548 in words is "one hundred sixty-one trillion, six hundred six billion, six hundred one million, five hundred eleven thousand, five hundred forty-eight".