16464899838464 has 320 divisors, whose sum is σ = 43152507205632. Its totient is φ = 6135946629120.

The previous prime is 16464899838451. The next prime is 16464899838469. The reversal of 16464899838464 is 46483899846461.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (16464899838469) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109641959 + ... + 109792025.

Almost surely, 2^{16464899838464} is an apocalyptic number.

16464899838464 is a gapful number since it is divisible by the number (14) 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 16464899838464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21576253602816).

16464899838464 is an abundant number, since it is smaller than the sum of its proper divisors (26687607367168).

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

16464899838464 is an equidigital number, since it uses as much as digits as its factorization.

16464899838464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150148 (or 150110 counting only the distinct ones).

The product of its digits is 6879707136, while the sum is 80.

The spelling of 16464899838464 in words is "sixteen trillion, four hundred sixty-four billion, eight hundred ninety-nine million, eight hundred thirty-eight thousand, four hundred sixty-four".