82781560863774 has 48 divisors (see below), whose sum is σ = 192198719683152. Its totient is φ = 25657785924864.

The previous prime is 82781560863767. The next prime is 82781560863779. The reversal of 82781560863774 is 47736806518728.

82781560863774 is a `hidden beast` number, since 8 + 2 + 7 + 8 + 1 + 5 + 608 + 6 + 3 + 7 + 7 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82781560863779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1629661209 + ... + 1629712004.

It is an arithmetic number, because the mean of its divisors is an integer number (4004139993399).

Almost surely, 2^{82781560863774} is an apocalyptic number.

82781560863774 is an abundant number, since it is smaller than the sum of its proper divisors (109417158819378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82781560863774 is a wasteful number, since it uses less digits than its factorization.

82781560863774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3259373321 (or 3259373318 counting only the distinct ones).

The product of its (nonzero) digits is 758661120, while the sum is 72.

The spelling of 82781560863774 in words is "eighty-two trillion, seven hundred eighty-one billion, five hundred sixty million, eight hundred sixty-three thousand, seven hundred seventy-four".