16749755381 has 8 divisors (see below), whose sum is σ = 17047764960. Its totient is φ = 16452216432.

The previous prime is 16749755369. The next prime is 16749755389. The reversal of 16749755381 is 18355794761.

It is a happy number.

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 16749755381 - 2⁶ = 16749755317 is a prime.

It is a super-2 number, since 2×16749755381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16749755389) 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, 45455 + ... + 188588.

It is an arithmetic number, because the mean of its divisors is an integer number (2130970620).

Almost surely, 2^16749755381 is an apocalyptic number.

It is an amenable number.

16749755381 is a deficient number, since it is larger than the sum of its proper divisors (298009579).

16749755381 is a wasteful number, since it uses less digits than its factorization.

16749755381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235315.

The product of its digits is 6350400, while the sum is 56.

The spelling of 16749755381 in words is "sixteen billion, seven hundred forty-nine million, seven hundred fifty-five thousand, three hundred eighty-one".