16161113026421 has 8 divisors (see below), whose sum is σ = 17630366865888. Its totient is φ = 14691869478000.

The previous prime is 16161113026417. The next prime is 16161113026469. The reversal of 16161113026421 is 12462031116161.

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

It is not a de Polignac number, because 16161113026421 - 2² = 16161113026417 is a prime.

It is a super-2 number, since 2×16161113026421² (a number of 27 digits) contains 22 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 (16161113028421) 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, 916586 + ... + 5758676.

It is an arithmetic number, because the mean of its divisors is an integer number (2203795858236).

Almost surely, 2^{16161113026421} is an apocalyptic number.

16161113026421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16161113026421 is a deficient number, since it is larger than the sum of its proper divisors (1469253839467).

16161113026421 is a wasteful number, since it uses less digits than its factorization.

16161113026421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5145523.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 16161113026421 in words is "sixteen trillion, one hundred sixty-one billion, one hundred thirteen million, twenty-six thousand, four hundred twenty-one".