52689070681 has 9 divisors (see below), whose sum is σ = 57057077181. Its totient is φ = 48633310752.

The previous prime is 52689070661. The next prime is 52689070697. The reversal of 52689070681 is 18607098625.

The square root of 52689070681 is 229541.

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

It can be written as a sum of positive squares in 4 ways, for example, as 28321860681 + 24367210000 = 168291^2 + 156100^2 .

It is a de Polignac number, because none of the positive numbers 2^k-52689070681 is a prime.

It is a super-2 number, since 2×52689070681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52689070661) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2975205 + ... + 2992861.

Almost surely, 2^52689070681 is an apocalyptic number.

52689070681 is the 229541-st square number.

52689070681 is the 114771-st centered octagonal number.

It is an amenable number.

52689070681 is a deficient number, since it is larger than the sum of its proper divisors (4368006500).

52689070681 is an frugal number, since it uses more digits than its factorization.

52689070681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35340 (or 17670 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 52689070681 in words is "fifty-two billion, six hundred eighty-nine million, seventy thousand, six hundred eighty-one".