3953550472681 has 2 divisors, whose sum is σ = 3953550472682. Its totient is φ = 3953550472680.

The previous prime is 3953550472631. The next prime is 3953550472717. The reversal of 3953550472681 is 1862740553593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3881372814400 + 72177658281 = 1970120^2 + 268659^2 .

It is a cyclic number.

It is not a de Polignac number, because 3953550472681 - 2¹⁵ = 3953550439913 is a prime.

It is a super-2 number, since 2×3953550472681² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3953550472601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1976775236340 + 1976775236341.

It is an arithmetic number, because the mean of its divisors is an integer number (1976775236341).

It is a 1-persistent number, because it is pandigital, but 2⋅3953550472681 = 7907100945362 is not.

Almost surely, 2^{3953550472681} is an apocalyptic number.

It is an amenable number.

3953550472681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3953550472681 is an equidigital number, since it uses as much as digits as its factorization.

3953550472681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216000, while the sum is 58.

The spelling of 3953550472681 in words is "three trillion, nine hundred fifty-three billion, five hundred fifty million, four hundred seventy-two thousand, six hundred eighty-one".