161398957948 has 24 divisors (see below), whose sum is σ = 282900763152. Its totient is φ = 80570267904.

The previous prime is 161398957927. The next prime is 161398958011. The reversal of 161398957948 is 849759893161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7324315 + ... + 7346317.

It is an arithmetic number, because the mean of its divisors is an integer number (11787531798).

Almost surely, 2^161398957948 is an apocalyptic number.

It is an amenable number.

161398957948 is a deficient number, since it is larger than the sum of its proper divisors (121501805204).

161398957948 is a wasteful number, since it uses less digits than its factorization.

161398957948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24861 (or 24859 counting only the distinct ones).

The product of its digits is 117573120, while the sum is 70.

The spelling of 161398957948 in words is "one hundred sixty-one billion, three hundred ninety-eight million, nine hundred fifty-seven thousand, nine hundred forty-eight".