161884909454 has 16 divisors (see below), whose sum is σ = 244108142208. Its totient is φ = 80516100192.

The previous prime is 161884909447. The next prime is 161884909457. The reversal of 161884909454 is 454909488161.

It is a junction number, because it is equal to n+sod(n) for n = 161884909393 and 161884909402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161884909457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427424 + ... + 711660.

It is an arithmetic number, because the mean of its divisors is an integer number (15256758888).

Almost surely, 2^161884909454 is an apocalyptic number.

161884909454 is a deficient number, since it is larger than the sum of its proper divisors (82223232754).

161884909454 is a wasteful number, since it uses less digits than its factorization.

161884909454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285739.

The product of its (nonzero) digits is 9953280, while the sum is 59.

The spelling of 161884909454 in words is "one hundred sixty-one billion, eight hundred eighty-four million, nine hundred nine thousand, four hundred fifty-four".