1661112622619 has 16 divisors (see below), whose sum is σ = 1741535712000. Its totient is φ = 1582524725760.

The previous prime is 1661112622577. The next prime is 1661112622649. The reversal of 1661112622619 is 9162262111661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1661112622619 is a prime.

It is a super-2 number, since 2×1661112622619² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1661112622619.

It is not an unprimeable number, because it can be changed into a prime (1661112622649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 682754 + ... + 1946375.

It is an arithmetic number, because the mean of its divisors is an integer number (108845982000).

Almost surely, 2^{1661112622619} is an apocalyptic number.

1661112622619 is a deficient number, since it is larger than the sum of its proper divisors (80423089381).

1661112622619 is a wasteful number, since it uses less digits than its factorization.

1661112622619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2629478.

The product of its digits is 93312, while the sum is 44.

The spelling of 1661112622619 in words is "one trillion, six hundred sixty-one billion, one hundred twelve million, six hundred twenty-two thousand, six hundred nineteen".