82378764981 has 12 divisors (see below), whose sum is σ = 119031107520. Its totient is φ = 54900919080.

The previous prime is 82378764971. The next prime is 82378765201. The reversal of 82378764981 is 18946787328.

82378764981 is a `hidden beast` number, since 8 + 2 + 3 + 78 + 76 + 498 + 1 = 666.

It is not a de Polignac number, because 82378764981 - 2¹⁵ = 82378732213 is a prime.

It is a super-2 number, since 2×82378764981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82378764931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1492861 + ... + 1547058.

It is an arithmetic number, because the mean of its divisors is an integer number (9919258960).

Almost surely, 2^82378764981 is an apocalyptic number.

It is an amenable number.

82378764981 is a deficient number, since it is larger than the sum of its proper divisors (36652342539).

82378764981 is a wasteful number, since it uses less digits than its factorization.

82378764981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3042936 (or 3042933 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The spelling of 82378764981 in words is "eighty-two billion, three hundred seventy-eight million, seven hundred sixty-four thousand, nine hundred eighty-one".