1661023456242 has 32 divisors (see below), whose sum is σ = 3330891383040. Its totient is φ = 552200668800.

The previous prime is 1661023456241. The next prime is 1661023456259. The reversal of 1661023456242 is 2426543201661.

It is a happy number.

It is a super-2 number, since 2×1661023456242² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1661023456194 and 1661023456203.

It is not an unprimeable number, because it can be changed into a prime (1661023456241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32447367 + ... + 32498517.

It is an arithmetic number, because the mean of its divisors is an integer number (104090355720).

Almost surely, 2^{1661023456242} is an apocalyptic number.

1661023456242 is an abundant number, since it is smaller than the sum of its proper divisors (1669867926798).

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

1661023456242 is a wasteful number, since it uses less digits than its factorization.

1661023456242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65458.

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 1661023456242 in words is "one trillion, six hundred sixty-one billion, twenty-three million, four hundred fifty-six thousand, two hundred forty-two".