1680122270642 has 4 divisors (see below), whose sum is σ = 2520183405966. Its totient is φ = 840061135320.

The previous prime is 1680122270621. The next prime is 1680122270657. The reversal of 1680122270642 is 2460722210861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1544425077001 + 135697193641 = 1242749^2 + 368371^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1680122270642.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420030567659 + ... + 420030567662.

Almost surely, 2^{1680122270642} is an apocalyptic number.

1680122270642 is a deficient number, since it is larger than the sum of its proper divisors (840061135324).

1680122270642 is an equidigital number, since it uses as much as digits as its factorization.

1680122270642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840061135323.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 1680122270642 in words is "one trillion, six hundred eighty billion, one hundred twenty-two million, two hundred seventy thousand, six hundred forty-two".