161444357508 has 48 divisors (see below), whose sum is σ = 430552886400. Its totient is φ = 46123252224.

The previous prime is 161444357507. The next prime is 161444357573. The reversal of 161444357508 is 805753444161.

It is not an unprimeable number, because it can be changed into a prime (161444357507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1076110 + ... + 1216922.

It is an arithmetic number, because the mean of its divisors is an integer number (8969851800).

Almost surely, 2^161444357508 is an apocalyptic number.

It is an amenable number.

161444357508 is an abundant number, since it is smaller than the sum of its proper divisors (269108528892).

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

161444357508 is a wasteful number, since it uses less digits than its factorization.

161444357508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154476 (or 154474 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 161444357508 in words is "one hundred sixty-one billion, four hundred forty-four million, three hundred fifty-seven thousand, five hundred eight".