16464242520 has 576 divisors, whose sum is σ = 63847980000. Its totient is φ = 3770426880.

The previous prime is 16464242489. The next prime is 16464242563. The reversal of 16464242520 is 2524246461.

16464242520 is a `hidden beast` number, since 1 + 6 + 4 + 642 + 4 + 2 + 5 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 47175306 + ... + 47175654.

Almost surely, 2^16464242520 is an apocalyptic number.

16464242520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16464242520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31923990000).

16464242520 is an abundant number, since it is smaller than the sum of its proper divisors (47383737480).

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

16464242520 is a wasteful number, since it uses less digits than its factorization.

16464242520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

Adding to 16464242520 its reverse (2524246461), we get a palindrome (18988488981).

The spelling of 16464242520 in words is "sixteen billion, four hundred sixty-four million, two hundred forty-two thousand, five hundred twenty".