53617718025 has 81 divisors (see below), whose sum is σ = 98595244839. Its totient is φ = 27853287840.

The previous prime is 53617718003. The next prime is 53617718051. The reversal of 53617718025 is 52081771635.

It is a happy number.

The square root of 53617718025 is 231555.

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

53617718025 is a `hidden beast` number, since 5 + 3 + 617 + 7 + 1 + 8 + 0 + 25 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19302378489 + 34315339536 = 138933^2 + 185244^2 .

It is not a de Polignac number, because 53617718025 - 2²⁵ = 53584163593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 149352796 + ... + 149353154.

Almost surely, 2^53617718025 is an apocalyptic number.

53617718025 is the 231555-th square number.

53617718025 is the 115778-th centered octagonal number.

It is an amenable number.

53617718025 is a deficient number, since it is larger than the sum of its proper divisors (44977526814).

53617718025 is an equidigital number, since it uses as much as digits as its factorization.

53617718025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The spelling of 53617718025 in words is "fifty-three billion, six hundred seventeen million, seven hundred eighteen thousand, twenty-five".