16215000016 has 10 divisors (see below), whose sum is σ = 31416562562. Its totient is φ = 8107500000.

The previous prime is 16215000001. The next prime is 16215000017. The reversal of 16215000016 is 61000051261.

It can be written as a sum of positive squares in only one way, i.e., 14558835600 + 1656164416 = 120660^2 + 40696^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16215000017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506718735 + ... + 506718766.

Almost surely, 2^16215000016 is an apocalyptic number.

16215000016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16215000016 is a deficient number, since it is larger than the sum of its proper divisors (15201562546).

16215000016 is a wasteful number, since it uses less digits than its factorization.

16215000016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013437509 (or 1013437503 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 16215000016 its reverse (61000051261), we get a palindrome (77215051277).

The spelling of 16215000016 in words is "sixteen billion, two hundred fifteen million, sixteen", and thus it is an aban number.