1661623234422 has 16 divisors (see below), whose sum is σ = 3323263859712. Its totient is φ = 553871513000.

The previous prime is 1661623234363. The next prime is 1661623234441. The reversal of 1661623234422 is 2244323261661.

It is a happy number.

It is a super-3 number, since 3×1661623234422³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747547 + ... + 1970297.

It is an arithmetic number, because the mean of its divisors is an integer number (207703991232).

Almost surely, 2^{1661623234422} is an apocalyptic number.

1661623234422 is an abundant number, since it is smaller than the sum of its proper divisors (1661640625290).

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

1661623234422 is a wasteful number, since it uses less digits than its factorization.

1661623234422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449243.

The product of its digits is 497664, while the sum is 42.

The spelling of 1661623234422 in words is "one trillion, six hundred sixty-one billion, six hundred twenty-three million, two hundred thirty-four thousand, four hundred twenty-two".