3551243221660 has 48 divisors (see below), whose sum is σ = 7560078817536. Its totient is φ = 1400981156352.

The previous prime is 3551243221651. The next prime is 3551243221663. The reversal of 3551243221660 is 661223421553.

It is a super-2 number, since 2×3551243221660² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3551243221663) 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, 63463054 + ... + 63518986.

It is an arithmetic number, because the mean of its divisors is an integer number (157501642032).

Almost surely, 2^{3551243221660} is an apocalyptic number.

It is an amenable number.

3551243221660 is an abundant number, since it is smaller than the sum of its proper divisors (4008835595876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3551243221660 is a wasteful number, since it uses less digits than its factorization.

3551243221660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99502 (or 99500 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 3551243221660 in words is "three trillion, five hundred fifty-one billion, two hundred forty-three million, two hundred twenty-one thousand, six hundred sixty".