161315282878 has 8 divisors (see below), whose sum is σ = 242102119968. Its totient is φ = 80614576224.

The previous prime is 161315282839. The next prime is 161315282923. The reversal of 161315282878 is 878282513161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21527926 + ... + 21535417.

It is an arithmetic number, because the mean of its divisors is an integer number (30262764996).

Almost surely, 2^161315282878 is an apocalyptic number.

161315282878 is a deficient number, since it is larger than the sum of its proper divisors (80786837090).

161315282878 is a wasteful number, since it uses less digits than its factorization.

161315282878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43065218.

The product of its digits is 1290240, while the sum is 52.

The spelling of 161315282878 in words is "one hundred sixty-one billion, three hundred fifteen million, two hundred eighty-two thousand, eight hundred seventy-eight".