16393780154 has 4 divisors (see below), whose sum is σ = 24590670234. Its totient is φ = 8196890076.

The previous prime is 16393780111. The next prime is 16393780157. The reversal of 16393780154 is 45108739361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45108739361 = 7 ⋅6444105623.

It can be written as a sum of positive squares in only one way, i.e., 15711369025 + 682411129 = 125345^2 + 26123^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16393780099 and 16393780108.

It is not an unprimeable number, because it can be changed into a prime (16393780157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4098445037 + ... + 4098445040.

Almost surely, 2^16393780154 is an apocalyptic number.

16393780154 is a deficient number, since it is larger than the sum of its proper divisors (8196890080).

16393780154 is an equidigital number, since it uses as much as digits as its factorization.

16393780154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8196890079.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 16393780154 in words is "sixteen billion, three hundred ninety-three million, seven hundred eighty thousand, one hundred fifty-four".