16256505506 has 8 divisors (see below), whose sum is σ = 24612653520. Its totient is φ = 8052287668.

The previous prime is 16256505491. The next prime is 16256505521. The reversal of 16256505506 is 60550565261.

It is an interprime number because it is at equal distance from previous prime (16256505491) and next prime (16256505521).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37982276 + ... + 37982703.

It is an arithmetic number, because the mean of its divisors is an integer number (3076581690).

Almost surely, 2^16256505506 is an apocalyptic number.

16256505506 is a deficient number, since it is larger than the sum of its proper divisors (8356148014).

16256505506 is a wasteful number, since it uses less digits than its factorization.

16256505506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75965088.

The product of its (nonzero) digits is 270000, while the sum is 41.

The spelling of 16256505506 in words is "sixteen billion, two hundred fifty-six million, five hundred five thousand, five hundred six".