1641721442126 has 8 divisors (see below), whose sum is σ = 2462706338544. Its totient is φ = 820819329280.

The previous prime is 1641721442099. The next prime is 1641721442131. The reversal of 1641721442126 is 6212441271461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20646290 + ... + 20725653.

It is an arithmetic number, because the mean of its divisors is an integer number (307838292318).

Almost surely, 2^{1641721442126} is an apocalyptic number.

1641721442126 is a deficient number, since it is larger than the sum of its proper divisors (820984896418).

1641721442126 is a wasteful number, since it uses less digits than its factorization.

1641721442126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41391786.

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

The spelling of 1641721442126 in words is "one trillion, six hundred forty-one billion, seven hundred twenty-one million, four hundred forty-two thousand, one hundred twenty-six".