781660383011 has 4 divisors (see below), whose sum is σ = 786906426000. Its totient is φ = 776414340024.

The previous prime is 781660382981. The next prime is 781660383029. The reversal of 781660383011 is 110383066187.

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

It is a cyclic number.

It is not a de Polignac number, because 781660383011 - 2⁶ = 781660382947 is a prime.

It is a super-2 number, since 2×781660383011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (781660383041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2623021271 + ... + 2623021568.

It is an arithmetic number, because the mean of its divisors is an integer number (196726606500).

Almost surely, 2^781660383011 is an apocalyptic number.

781660383011 is a deficient number, since it is larger than the sum of its proper divisors (5246042989).

781660383011 is a wasteful number, since it uses less digits than its factorization.

781660383011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5246042988.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 781660383011 in words is "seven hundred eighty-one billion, six hundred sixty million, three hundred eighty-three thousand, eleven".