161506445044 has 24 divisors (see below), whose sum is σ = 333432662528. Its totient is φ = 66984239520.

The previous prime is 161506445041. The next prime is 161506445059. The reversal of 161506445044 is 440544605161.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 161506444988 and 161506445006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161506445041) 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, 93032799 + ... + 93034534.

Almost surely, 2^161506445044 is an apocalyptic number.

161506445044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161506445044 is an abundant number, since it is smaller than the sum of its proper divisors (171926217484).

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

161506445044 is a wasteful number, since it uses less digits than its factorization.

161506445044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186067375 (or 186067373 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

The spelling of 161506445044 in words is "one hundred sixty-one billion, five hundred six million, four hundred forty-five thousand, forty-four".