16121385137 has 8 divisors (see below), whose sum is σ = 18939809280. Its totient is φ = 13528434960.

The previous prime is 16121385109. The next prime is 16121385169. The reversal of 16121385137 is 73158312161.

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 16121385137 - 2²⁴ = 16104607921 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 16121385137.

It is not an unprimeable number, because it can be changed into a prime (16121385337) 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, 56368337 + ... + 56368622.

It is an arithmetic number, because the mean of its divisors is an integer number (2367476160).

Almost surely, 2^16121385137 is an apocalyptic number.

It is an amenable number.

16121385137 is a deficient number, since it is larger than the sum of its proper divisors (2818424143).

16121385137 is a wasteful number, since it uses less digits than its factorization.

16121385137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112736983.

The product of its digits is 30240, while the sum is 38.

Adding to 16121385137 its reverse (73158312161), we get a palindrome (89279697298).

The spelling of 16121385137 in words is "sixteen billion, one hundred twenty-one million, three hundred eighty-five thousand, one hundred thirty-seven".