16531466646 has 16 divisors (see below), whose sum is σ = 34203034800. Its totient is φ = 5320471968.

The previous prime is 16531466603. The next prime is 16531466669. The reversal of 16531466646 is 64666413561.

It is a junction number, because it is equal to n+sod(n) for n = 16531466595 and 16531466604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47504041 + ... + 47504388.

It is an arithmetic number, because the mean of its divisors is an integer number (2137689675).

Almost surely, 2^16531466646 is an apocalyptic number.

16531466646 is an abundant number, since it is smaller than the sum of its proper divisors (17671568154).

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

16531466646 is a wasteful number, since it uses less digits than its factorization.

16531466646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95008463.

The product of its digits is 1866240, while the sum is 48.

The spelling of 16531466646 in words is "sixteen billion, five hundred thirty-one million, four hundred sixty-six thousand, six hundred forty-six".