3551566651553 has 4 divisors (see below), whose sum is σ = 3586730677908. Its totient is φ = 3516402625200.

The previous prime is 3551566651543. The next prime is 3551566651627.

3551566651553 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3342253081489 + 209313570064 = 1828183^2 + 457508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3551566651553 is a prime.

It is a super-2 number, since 2×3551566651553² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3551566651543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17582013026 + ... + 17582013227.

It is an arithmetic number, because the mean of its divisors is an integer number (896682669477).

Almost surely, 2^{3551566651553} is an apocalyptic number.

It is an amenable number.

3551566651553 is a deficient number, since it is larger than the sum of its proper divisors (35164026355).

3551566651553 is a wasteful number, since it uses less digits than its factorization.

3551566651553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35164026354.

The product of its digits is 30375000, while the sum is 56.

The spelling of 3551566651553 in words is "three trillion, five hundred fifty-one billion, five hundred sixty-six million, six hundred fifty-one thousand, five hundred fifty-three".