16506655656 has 32 divisors (see below), whose sum is σ = 41401076640. Its totient is φ = 5484293568.

The previous prime is 16506655651. The next prime is 16506655657. The reversal of 16506655656 is 65655660561.

It is a junction number, because it is equal to n+sod(n) for n = 16506655599 and 16506655608.

It is not an unprimeable number, because it can be changed into a prime (16506655651) 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, 1112791 + ... + 1127526.

It is an arithmetic number, because the mean of its divisors is an integer number (1293783645).

Almost surely, 2^16506655656 is an apocalyptic number.

It is an amenable number.

16506655656 is an abundant number, since it is smaller than the sum of its proper divisors (24894420984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16506655656 is a wasteful number, since it uses less digits than its factorization.

16506655656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240633 (or 2240629 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 16506655656 in words is "sixteen billion, five hundred six million, six hundred fifty-five thousand, six hundred fifty-six".