161523563545020 has 96 divisors (see below), whose sum is σ = 476087532076800. Its totient is φ = 40804403042304.

The previous prime is 161523563545007. The next prime is 161523563545027. The reversal of 161523563545020 is 20545365325161.

161523563545020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161523563545020² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161523563545027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27485772 + ... + 32840748.

It is an arithmetic number, because the mean of its divisors is an integer number (4959245125800).

Almost surely, 2^{161523563545020} is an apocalyptic number.

161523563545020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161523563545020 is an abundant number, since it is smaller than the sum of its proper divisors (314563968531780).

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

161523563545020 is a wasteful number, since it uses less digits than its factorization.

161523563545020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5381467 (or 5381465 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 48.

The spelling of 161523563545020 in words is "one hundred sixty-one trillion, five hundred twenty-three billion, five hundred sixty-three million, five hundred forty-five thousand, twenty".