82404154386781 has 4 divisors (see below), whose sum is σ = 86741215144000. Its totient is φ = 78067093629564.

The previous prime is 82404154386767. The next prime is 82404154386811. The reversal of 82404154386781 is 18768345140428.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 82404154386781 - 2¹¹ = 82404154384733 is a prime.

It is a super-2 number, since 2×82404154386781² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82404154386721) 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, 2168530378581 + ... + 2168530378618.

It is an arithmetic number, because the mean of its divisors is an integer number (21685303786000).

Almost surely, 2^{82404154386781} is an apocalyptic number.

It is an amenable number.

82404154386781 is a deficient number, since it is larger than the sum of its proper divisors (4337060757219).

82404154386781 is a wasteful number, since it uses less digits than its factorization.

82404154386781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4337060757218.

The product of its (nonzero) digits is 41287680, while the sum is 61.

The spelling of 82404154386781 in words is "eighty-two trillion, four hundred four billion, one hundred fifty-four million, three hundred eighty-six thousand, seven hundred eighty-one".