16515252365 has 8 divisors (see below), whose sum is σ = 19819208088. Its totient is φ = 13211598400.

The previous prime is 16515252349. The next prime is 16515252389. The reversal of 16515252365 is 56325251561.

It can be written as a sum of positive squares in 4 ways, for example, as 10967535076 + 5547717289 = 104726^2 + 74483^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16515252365 - 2⁴ = 16515252349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70715 + ... + 195015.

It is an arithmetic number, because the mean of its divisors is an integer number (2477401011).

Almost surely, 2^16515252365 is an apocalyptic number.

It is an amenable number.

16515252365 is a deficient number, since it is larger than the sum of its proper divisors (3303955723).

16515252365 is a wasteful number, since it uses less digits than its factorization.

16515252365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150879.

The product of its digits is 270000, while the sum is 41.

The spelling of 16515252365 in words is "sixteen billion, five hundred fifteen million, two hundred fifty-two thousand, three hundred sixty-five".