3551548244681 has 2 divisors, whose sum is σ = 3551548244682. Its totient is φ = 3551548244680.

The previous prime is 3551548244669. The next prime is 3551548244711. The reversal of 3551548244681 is 1864428451553.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3535076832400 + 16471412281 = 1880180^2 + 128341^2 .

It is an emirp because it is prime and its reverse (1864428451553) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3551548244681 - 2¹⁰ = 3551548243657 is a prime.

It is a super-2 number, since 2×3551548244681² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3551548244611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1775774122340 + 1775774122341.

It is an arithmetic number, because the mean of its divisors is an integer number (1775774122341).

Almost surely, 2^{3551548244681} is an apocalyptic number.

It is an amenable number.

3551548244681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3551548244681 is an equidigital number, since it uses as much as digits as its factorization.

3551548244681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432000, while the sum is 56.

The spelling of 3551548244681 in words is "three trillion, five hundred fifty-one billion, five hundred forty-eight million, two hundred forty-four thousand, six hundred eighty-one".