1622680918181 has 4 divisors (see below), whose sum is σ = 1622798833632. Its totient is φ = 1622563002732.

The previous prime is 1622680918171. The next prime is 1622680918213. The reversal of 1622680918181 is 1818190862261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1622680918181 is a prime.

It is a super-2 number, since 2×1622680918181² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622680918171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58937081 + ... + 58964606.

It is an arithmetic number, because the mean of its divisors is an integer number (405699708408).

Almost surely, 2^{1622680918181} is an apocalyptic number.

It is an amenable number.

1622680918181 is a deficient number, since it is larger than the sum of its proper divisors (117915451).

1622680918181 is a wasteful number, since it uses less digits than its factorization.

1622680918181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117915450.

The product of its (nonzero) digits is 663552, while the sum is 53.

The spelling of 1622680918181 in words is "one trillion, six hundred twenty-two billion, six hundred eighty million, nine hundred eighteen thousand, one hundred eighty-one".