16506423510 has 128 divisors (see below), whose sum is σ = 41167526400. Its totient is φ = 4233461760.

The previous prime is 16506423499. The next prime is 16506423511. The reversal of 16506423510 is 1532460561.

It is a super-3 number, since 3×16506423510³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16506423511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21464406 + ... + 21465174.

It is an arithmetic number, because the mean of its divisors is an integer number (321621300).

Almost surely, 2^16506423510 is an apocalyptic number.

16506423510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16506423510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20583763200).

16506423510 is an abundant number, since it is smaller than the sum of its proper divisors (24661102890).

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

16506423510 is a wasteful number, since it uses less digits than its factorization.

16506423510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 16506423510 in words is "sixteen billion, five hundred six million, four hundred twenty-three thousand, five hundred ten".