687568571928053 has 2 divisors, whose sum is σ = 687568571928054. Its totient is φ = 687568571928052.

The previous prime is 687568571927863. The next prime is 687568571928083. The reversal of 687568571928053 is 350829175865786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 534822652770289 + 152745919157764 = 23126233^2 + 12359042^2 .

It is a cyclic number.

It is not a de Polignac number, because 687568571928053 - 2¹⁸ = 687568571665909 is a prime.

It is a super-2 number, since 2×687568571928053² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687568571928083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343784285964026 + 343784285964027.

It is an arithmetic number, because the mean of its divisors is an integer number (343784285964027).

Almost surely, 2^{687568571928053} is an apocalyptic number.

It is an amenable number.

687568571928053 is a deficient number, since it is larger than the sum of its proper divisors (1).

687568571928053 is an equidigital number, since it uses as much as digits as its factorization.

687568571928053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6096384000, while the sum is 80.

The spelling of 687568571928053 in words is "six hundred eighty-seven trillion, five hundred sixty-eight billion, five hundred seventy-one million, nine hundred twenty-eight thousand, fifty-three".