16525665251 has 8 divisors (see below), whose sum is σ = 16703715840. Its totient is φ = 16347771648.

The previous prime is 16525665179. The next prime is 16525665257. The reversal of 16525665251 is 15256652561.

16525665251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 16525665251 - 2¹⁰ = 16525664227 is a prime.

It is a super-2 number, since 2×16525665251² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16525665257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178910 + ... + 255068.

It is an arithmetic number, because the mean of its divisors is an integer number (2087964480).

Almost surely, 2^16525665251 is an apocalyptic number.

16525665251 is a deficient number, since it is larger than the sum of its proper divisors (178050589).

16525665251 is an equidigital number, since it uses as much as digits as its factorization.

16525665251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78493.

The product of its digits is 540000, while the sum is 44.

The spelling of 16525665251 in words is "sixteen billion, five hundred twenty-five million, six hundred sixty-five thousand, two hundred fifty-one".