1661255622422 has 64 divisors (see below), whose sum is σ = 2977388305920. Its totient is φ = 686514009600.

The previous prime is 1661255622419. The next prime is 1661255622487. The reversal of 1661255622422 is 2242265521661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1491647 + ... + 2355317.

It is an arithmetic number, because the mean of its divisors is an integer number (46521692280).

Almost surely, 2^{1661255622422} is an apocalyptic number.

1661255622422 is a deficient number, since it is larger than the sum of its proper divisors (1316132683498).

1661255622422 is a wasteful number, since it uses less digits than its factorization.

1661255622422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863877.

The product of its digits is 691200, while the sum is 44.

The spelling of 1661255622422 in words is "one trillion, six hundred sixty-one billion, two hundred fifty-five million, six hundred twenty-two thousand, four hundred twenty-two".