3551681011443 has 16 divisors (see below), whose sum is σ = 4985199060480. Its totient is φ = 2244797227904.

The previous prime is 3551681011433. The next prime is 3551681011499. The reversal of 3551681011443 is 3441101861553.

It is a cyclic number.

It is not a de Polignac number, because 3551681011443 - 2⁹ = 3551681010931 is a prime.

It is a super-2 number, since 2×3551681011443² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3551681011395 and 3551681011404.

It is not an unprimeable number, because it can be changed into a prime (3551681011433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227751663 + ... + 227767256.

It is an arithmetic number, because the mean of its divisors is an integer number (311574941280).

Almost surely, 2^{3551681011443} is an apocalyptic number.

3551681011443 is a deficient number, since it is larger than the sum of its proper divisors (1433518049037).

3551681011443 is a wasteful number, since it uses less digits than its factorization.

3551681011443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455519058.

The product of its (nonzero) digits is 172800, while the sum is 42.

Adding to 3551681011443 its reverse (3441101861553), we get a palindrome (6992782872996).

The spelling of 3551681011443 in words is "three trillion, five hundred fifty-one billion, six hundred eighty-one million, eleven thousand, four hundred forty-three".