16506423406 has 32 divisors (see below), whose sum is σ = 28536468480. Its totient is φ = 7090053600.

The previous prime is 16506423391. The next prime is 16506423421. The reversal of 16506423406 is 60432460561.

It is an interprime number because it is at equal distance from previous prime (16506423391) and next prime (16506423421).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 245250 + ... + 305221.

It is an arithmetic number, because the mean of its divisors is an integer number (891764640).

Almost surely, 2^16506423406 is an apocalyptic number.

16506423406 is a deficient number, since it is larger than the sum of its proper divisors (12030045074).

16506423406 is a wasteful number, since it uses less digits than its factorization.

16506423406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550560.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 16506423406 its reverse (60432460561), we get a palindrome (76938883967).

The spelling of 16506423406 in words is "sixteen billion, five hundred six million, four hundred twenty-three thousand, four hundred six".