16516621354 has 16 divisors (see below), whose sum is σ = 26548337088. Its totient is φ = 7678881472.

The previous prime is 16516621301. The next prime is 16516621367. The reversal of 16516621354 is 45312661561.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2923582 + ... + 2929225.

It is an arithmetic number, because the mean of its divisors is an integer number (1659271068).

Almost surely, 2^16516621354 is an apocalyptic number.

16516621354 is a deficient number, since it is larger than the sum of its proper divisors (10031715734).

16516621354 is a wasteful number, since it uses less digits than its factorization.

16516621354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5852909.

The product of its digits is 129600, while the sum is 40.

The spelling of 16516621354 in words is "sixteen billion, five hundred sixteen million, six hundred twenty-one thousand, three hundred fifty-four".