16315638540 has 48 divisors (see below), whose sum is σ = 45697569120. Its totient is φ = 4349524480.

The previous prime is 16315638533. The next prime is 16315638553. The reversal of 16315638540 is 4583651361.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 16315638492 and 16315638501.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168376 + ... + 246944.

It is an arithmetic number, because the mean of its divisors is an integer number (952032690).

Almost surely, 2^16315638540 is an apocalyptic number.

16315638540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16315638540 is an abundant number, since it is smaller than the sum of its proper divisors (29381930580).

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

16315638540 is a wasteful number, since it uses less digits than its factorization.

16315638540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82042 (or 82040 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 16315638540 in words is "sixteen billion, three hundred fifteen million, six hundred thirty-eight thousand, five hundred forty".