161525054464 has 132 divisors (see below), whose sum is σ = 360841131504. Its totient is φ = 72008368128.

The previous prime is 161525054443. The next prime is 161525054477. The reversal of 161525054464 is 464450525161.

It is a self number, because there is not a number n which added to its sum of digits gives 161525054464.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6271437 + ... + 6297139.

Almost surely, 2^161525054464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161525054464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180420565752).

161525054464 is an abundant number, since it is smaller than the sum of its proper divisors (199316077040).

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

161525054464 is a wasteful number, since it uses less digits than its factorization.

161525054464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25778 (or 25741 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 161525054464 in words is "one hundred sixty-one billion, five hundred twenty-five million, fifty-four thousand, four hundred sixty-four".