161148657278 has 16 divisors (see below), whose sum is σ = 276450939360. Its totient is φ = 69014685696.

The previous prime is 161148657253. The next prime is 161148657323. The reversal of 161148657278 is 872756841161.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4064951 + ... + 4104402.

It is an arithmetic number, because the mean of its divisors is an integer number (17278183710).

Almost surely, 2^161148657278 is an apocalyptic number.

161148657278 is a deficient number, since it is larger than the sum of its proper divisors (115302282082).

161148657278 is a wasteful number, since it uses less digits than its factorization.

161148657278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8170771.

The product of its digits is 4515840, while the sum is 56.

The spelling of 161148657278 in words is "one hundred sixty-one billion, one hundred forty-eight million, six hundred fifty-seven thousand, two hundred seventy-eight".