355522321566 has 96 divisors (see below), whose sum is σ = 830353305600. Its totient is φ = 109614384000.

The previous prime is 355522321547. The next prime is 355522321573. The reversal of 355522321566 is 665123225553.

It is a happy number.

355522321566 is a `hidden beast` number, since 3 + 5 + 5 + 52 + 2 + 32 + 1 + 566 = 666.

It is a super-2 number, since 2×355522321566² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17944866 + ... + 17964666.

It is an arithmetic number, because the mean of its divisors is an integer number (8649513600).

Almost surely, 2^355522321566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 355522321566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (415176652800).

355522321566 is an abundant number, since it is smaller than the sum of its proper divisors (474830984034).

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

355522321566 is a wasteful number, since it uses less digits than its factorization.

355522321566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21262 (or 21259 counting only the distinct ones).

The product of its digits is 1620000, while the sum is 45.

The spelling of 355522321566 in words is "three hundred fifty-five billion, five hundred twenty-two million, three hundred twenty-one thousand, five hundred sixty-six".