16121361623 has 8 divisors (see below), whose sum is σ = 16971024000. Its totient is φ = 15271816248.

The previous prime is 16121361593. The next prime is 16121361673. The reversal of 16121361623 is 32616312161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16121361623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16121361623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16121361673) 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, 491078 + ... + 522876.

It is an arithmetic number, because the mean of its divisors is an integer number (2121378000).

Almost surely, 2^16121361623 is an apocalyptic number.

16121361623 is a deficient number, since it is larger than the sum of its proper divisors (849662377).

16121361623 is a wasteful number, since it uses less digits than its factorization.

16121361623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58501.

The product of its digits is 7776, while the sum is 32.

Adding to 16121361623 its reverse (32616312161), we get a palindrome (48737673784).

The spelling of 16121361623 in words is "sixteen billion, one hundred twenty-one million, three hundred sixty-one thousand, six hundred twenty-three".