16506423536 has 40 divisors (see below), whose sum is σ = 33085726128. Its totient is φ = 7972160000.

The previous prime is 16506423529. The next prime is 16506423539. The reversal of 16506423536 is 63532460561.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a junction number, because it is equal to n+sod(n) for n = 16506423493 and 16506423502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16506423539) 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, 58310 + ... + 190821.

Almost surely, 2^16506423536 is an apocalyptic number.

16506423536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16506423536 is an abundant number, since it is smaller than the sum of its proper divisors (16579302592).

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

16506423536 is a wasteful number, since it uses less digits than its factorization.

16506423536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249281 (or 249275 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 16506423536 in words is "sixteen billion, five hundred six million, four hundred twenty-three thousand, five hundred thirty-six".