16000521563 has 8 divisors (see below), whose sum is σ = 17597955648. Its totient is φ = 14455462464.

The previous prime is 16000521557. The next prime is 16000521577. The reversal of 16000521563 is 36512500061.

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

It is a cyclic number.

It is not a de Polignac number, because 16000521563 - 2⁸ = 16000521307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16000521583) 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, 13093106 + ... + 13094327.

It is an arithmetic number, because the mean of its divisors is an integer number (2199744456).

Almost surely, 2^16000521563 is an apocalyptic number.

16000521563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16000521563 is a deficient number, since it is larger than the sum of its proper divisors (1597434085).

16000521563 is a wasteful number, since it uses less digits than its factorization.

16000521563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26187493.

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 16000521563 in words is "sixteen billion, five hundred twenty-one thousand, five hundred sixty-three".