82783078278055 has 16 divisors (see below), whose sum is σ = 99449437777920. Its totient is φ = 66153302455968.

The previous prime is 82783078278053. The next prime is 82783078278071. The reversal of 82783078278055 is 55087287038728.

It is a cyclic number.

It is not a de Polignac number, because 82783078278055 - 2¹ = 82783078278053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82783078278053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385426924 + ... + 385641646.

It is an arithmetic number, because the mean of its divisors is an integer number (6215589861120).

Almost surely, 2^{82783078278055} is an apocalyptic number.

82783078278055 is a deficient number, since it is larger than the sum of its proper divisors (16666359499865).

82783078278055 is a wasteful number, since it uses less digits than its factorization.

82783078278055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299550.

The product of its (nonzero) digits is 421478400, while the sum is 70.

The spelling of 82783078278055 in words is "eighty-two trillion, seven hundred eighty-three billion, seventy-eight million, two hundred seventy-eight thousand, fifty-five".