1979781699841 has 8 divisors (see below), whose sum is σ = 2159772048000. Its totient is φ = 1799793050640.

The previous prime is 1979781699839. The next prime is 1979781699851. The reversal of 1979781699841 is 1489961879791.

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

It is a cyclic number.

It is not a de Polignac number, because 1979781699841 - 2¹ = 1979781699839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979781699811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4224360 + ... + 4669558.

It is an arithmetic number, because the mean of its divisors is an integer number (269971506000).

Almost surely, 2^{1979781699841} is an apocalyptic number.

1979781699841 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1979781699841 is a deficient number, since it is larger than the sum of its proper divisors (179990348159).

1979781699841 is a wasteful number, since it uses less digits than its factorization.

1979781699841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849479.

The product of its digits is 493807104, while the sum is 79.

The spelling of 1979781699841 in words is "one trillion, nine hundred seventy-nine billion, seven hundred eighty-one million, six hundred ninety-nine thousand, eight hundred forty-one".