16117572025 has 9 divisors (see below), whose sum is σ = 19986576463. Its totient is φ = 12893549800.

The previous prime is 16117572019. The next prime is 16117572043. The reversal of 16117572025 is 52027571161.

The square root of 16117572025 is 126955.

It is a perfect power (a square), and thus also a powerful number.

16117572025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5802325929 + 10315246096 = 76173^2 + 101564^2 .

It is not a de Polignac number, because 16117572025 - 2³ = 16117572017 is a prime.

It is a super-2 number, since 2×16117572025² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 622080 + ... + 647470.

Almost surely, 2^16117572025 is an apocalyptic number.

16117572025 is the 126955-th square number.

16117572025 is the 63478-th centered octagonal number.

It is an amenable number.

16117572025 is a deficient number, since it is larger than the sum of its proper divisors (3869004438).

16117572025 is an frugal number, since it uses more digits than its factorization.

16117572025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50792 (or 25396 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 37.

The spelling of 16117572025 in words is "sixteen billion, one hundred seventeen million, five hundred seventy-two thousand, twenty-five".