161256660834 has 8 divisors (see below), whose sum is σ = 322513321680. Its totient is φ = 53752220276.

The previous prime is 161256660823. The next prime is 161256660853. The reversal of 161256660834 is 438066652161.

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

161256660834 is an admirable 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, 13438055064 + ... + 13438055075.

It is an arithmetic number, because the mean of its divisors is an integer number (40314165210).

Almost surely, 2^161256660834 is an apocalyptic number.

161256660834 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161256660834 is a wasteful number, since it uses less digits than its factorization.

161256660834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26876110144.

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 161256660834 in words is "one hundred sixty-one billion, two hundred fifty-six million, six hundred sixty thousand, eight hundred thirty-four".