16645402054 has 4 divisors (see below), whose sum is σ = 24968103084. Its totient is φ = 8322701026.

The previous prime is 16645402027. The next prime is 16645402057. The reversal of 16645402054 is 45020454661.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16645402057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4161350512 + ... + 4161350515.

It is an arithmetic number, because the mean of its divisors is an integer number (6242025771).

Almost surely, 2^16645402054 is an apocalyptic number.

16645402054 is a deficient number, since it is larger than the sum of its proper divisors (8322701030).

16645402054 is an equidigital number, since it uses as much as digits as its factorization.

16645402054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8322701029.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 16645402054 in words is "sixteen billion, six hundred forty-five million, four hundred two thousand, fifty-four".