161337161644 has 6 divisors (see below), whose sum is σ = 282340032884. Its totient is φ = 80668580820.

The previous prime is 161337161627. The next prime is 161337161651. The reversal of 161337161644 is 446161733161.

161337161644 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 161337161644.

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 as a sum of consecutive naturals, namely, 20167145202 + ... + 20167145209.

Almost surely, 2^161337161644 is an apocalyptic number.

It is an amenable number.

161337161644 is a deficient number, since it is larger than the sum of its proper divisors (121002871240).

161337161644 is a wasteful number, since it uses less digits than its factorization.

161337161644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40334290415 (or 40334290413 counting only the distinct ones).

The product of its digits is 217728, while the sum is 43.

The spelling of 161337161644 in words is "one hundred sixty-one billion, three hundred thirty-seven million, one hundred sixty-one thousand, six hundred forty-four".