161411455446421 has 4 divisors (see below), whose sum is σ = 161411499939744. Its totient is φ = 161411410953100.

The previous prime is 161411455446413. The next prime is 161411455446427. The reversal of 161411455446421 is 124644554114161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161411455446421 - 2³ = 161411455446413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161411455446427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16269745 + ... + 24238966.

It is an arithmetic number, because the mean of its divisors is an integer number (40352874984936).

Almost surely, 2^{161411455446421} is an apocalyptic number.

It is an amenable number.

161411455446421 is a deficient number, since it is larger than the sum of its proper divisors (44493323).

161411455446421 is an equidigital number, since it uses as much as digits as its factorization.

161411455446421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44493322.

The product of its digits is 1843200, while the sum is 49.

The spelling of 161411455446421 in words is "one hundred sixty-one trillion, four hundred eleven billion, four hundred fifty-five million, four hundred forty-six thousand, four hundred twenty-one".