44161351421 has 4 divisors (see below), whose sum is σ = 48176019744. Its totient is φ = 40146683100.

The previous prime is 44161351397. The next prime is 44161351459. The reversal of 44161351421 is 12415316144.

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 a de Polignac number, because none of the positive numbers 2^k-44161351421 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 (44161351021) 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, 2007334145 + ... + 2007334166.

It is an arithmetic number, because the mean of its divisors is an integer number (12044004936).

Almost surely, 2^44161351421 is an apocalyptic number.

It is an amenable number.

44161351421 is a deficient number, since it is larger than the sum of its proper divisors (4014668323).

44161351421 is a wasteful number, since it uses less digits than its factorization.

44161351421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4014668322.

The product of its digits is 11520, while the sum is 32.

Adding to 44161351421 its reverse (12415316144), we get a palindrome (56576667565).

The spelling of 44161351421 in words is "forty-four billion, one hundred sixty-one million, three hundred fifty-one thousand, four hundred twenty-one".