83157680104781 has 4 divisors (see below), whose sum is σ = 83157890543100. Its totient is φ = 83157469666464.

The previous prime is 83157680104721. The next prime is 83157680104813. The reversal of 83157680104781 is 18740108675138.

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 2 ways, for example, as 68902184938756 + 14255495166025 = 8300734^2 + 3775645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83157680104781 is a prime.

It is a super-2 number, since 2×83157680104781² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83157680104781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83157680104721) 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, 104625296 + ... + 105417113.

It is an arithmetic number, because the mean of its divisors is an integer number (20789472635775).

Almost surely, 2^{83157680104781} is an apocalyptic number.

It is an amenable number.

83157680104781 is a deficient number, since it is larger than the sum of its proper divisors (210438319).

83157680104781 is a wasteful number, since it uses less digits than its factorization.

83157680104781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210438318.

The product of its (nonzero) digits is 9031680, while the sum is 59.

The spelling of 83157680104781 in words is "eighty-three trillion, one hundred fifty-seven billion, six hundred eighty million, one hundred four thousand, seven hundred eighty-one".