15765470216 has 16 divisors (see below), whose sum is σ = 30579576300. Its totient is φ = 7610916544.

The previous prime is 15765470213. The next prime is 15765470243. The reversal of 15765470216 is 61207456751.

It can be written as a sum of positive squares in 2 ways, for example, as 15093105316 + 672364900 = 122854^2 + 25930^2 .

It is a super-2 number, since 2×15765470216² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15765470213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33977075 + ... + 33977538.

Almost surely, 2^15765470216 is an apocalyptic number.

It is an amenable number.

15765470216 is a deficient number, since it is larger than the sum of its proper divisors (14814106084).

15765470216 is a wasteful number, since it uses less digits than its factorization.

15765470216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67954648 (or 67954644 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 15765470216 in words is "fifteen billion, seven hundred sixty-five million, four hundred seventy thousand, two hundred sixteen".