16421144112461 has 8 divisors (see below), whose sum is σ = 18034203420000. Its totient is φ = 14828122809040.

The previous prime is 16421144112449. The next prime is 16421144112463.

16421144112461 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16421144112461 - 2⁴² = 12023097601357 is a prime.

It is a super-4 number, since 4×16421144112461⁴ (a number of 54 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16421144112463) 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, 5009499311 + ... + 5009502588.

It is an arithmetic number, because the mean of its divisors is an integer number (2254275427500).

Almost surely, 2^{16421144112461} is an apocalyptic number.

16421144112461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16421144112461 is a deficient number, since it is larger than the sum of its proper divisors (1613059307539).

16421144112461 is a wasteful number, since it uses less digits than its factorization.

16421144112461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10019002059.

The product of its digits is 36864, while the sum is 38.

It can be divided in two parts, 1642114 and 4112461, that added together give a palindrome (5754575).

The spelling of 16421144112461 in words is "sixteen trillion, four hundred twenty-one billion, one hundred forty-four million, one hundred twelve thousand, four hundred sixty-one".