16525706640 has 160 divisors (see below), whose sum is σ = 53282542080. Its totient is φ = 4233295872.

The previous prime is 16525706623. The next prime is 16525706669. The reversal of 16525706640 is 4660752561.

It is a junction number, because it is equal to n+sod(n) for n = 16525706592 and 16525706601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 689742 + ... + 713298.

It is an arithmetic number, because the mean of its divisors is an integer number (333015888).

Almost surely, 2^16525706640 is an apocalyptic number.

16525706640 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 16525706640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26641271040).

16525706640 is an abundant number, since it is smaller than the sum of its proper divisors (36756835440).

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

16525706640 is a wasteful number, since it uses less digits than its factorization.

16525706640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23689 (or 23683 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 16525706640 in words is "sixteen billion, five hundred twenty-five million, seven hundred six thousand, six hundred forty".