161895445248 has 54 divisors (see below), whose sum is σ = 430907660764. Its totient is φ = 53961431552.

The previous prime is 161895445247. The next prime is 161895445259. The reversal of 161895445248 is 842544598161.

It is not an unprimeable number, because it can be changed into a prime (161895445247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11143333 + ... + 11157851.

Almost surely, 2^161895445248 is an apocalyptic number.

It is an amenable number.

161895445248 is an abundant number, since it is smaller than the sum of its proper divisors (269012215516).

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

161895445248 is an frugal number, since it uses more digits than its factorization.

161895445248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29057 (or 14524 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 57.

The spelling of 161895445248 in words is "one hundred sixty-one billion, eight hundred ninety-five million, four hundred forty-five thousand, two hundred forty-eight".