161926751438 has 12 divisors (see below), whose sum is σ = 256346645040. Its totient is φ = 76702145076.

The previous prime is 161926751423. The next prime is 161926751461. The reversal of 161926751438 is 834157629161.

161926751438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161926751438.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112136918 + ... + 112138361.

It is an arithmetic number, because the mean of its divisors is an integer number (21362220420).

Almost surely, 2^161926751438 is an apocalyptic number.

161926751438 is a deficient number, since it is larger than the sum of its proper divisors (94419893602).

161926751438 is a wasteful number, since it uses less digits than its factorization.

161926751438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224275319 (or 224275300 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 53.

The spelling of 161926751438 in words is "one hundred sixty-one billion, nine hundred twenty-six million, seven hundred fifty-one thousand, four hundred thirty-eight".