16551605115 has 48 divisors (see below), whose sum is σ = 29951857728. Its totient is φ = 8439475968.

The previous prime is 16551605101. The next prime is 16551605159. The reversal of 16551605115 is 51150615561.

It is a happy number.

It is not a de Polignac number, because 16551605115 - 2¹² = 16551601019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16551605115.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3762097 + ... + 3766493.

It is an arithmetic number, because the mean of its divisors is an integer number (623997036).

Almost surely, 2^16551605115 is an apocalyptic number.

16551605115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16551605115 is a deficient number, since it is larger than the sum of its proper divisors (13400252613).

16551605115 is a wasteful number, since it uses less digits than its factorization.

16551605115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8068 (or 8065 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 16551605115 in words is "sixteen billion, five hundred fifty-one million, six hundred five thousand, one hundred fifteen".