82704475128631 has 2 divisors, whose sum is σ = 82704475128632. Its totient is φ = 82704475128630.

The previous prime is 82704475128571. The next prime is 82704475128673. The reversal of 82704475128631 is 13682157440728.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82704475128631 is a prime.

It is a super-2 number, since 2×82704475128631² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82704475128131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41352237564315 + 41352237564316.

It is an arithmetic number, because the mean of its divisors is an integer number (41352237564316).

Almost surely, 2^{82704475128631} is an apocalyptic number.

82704475128631 is a deficient number, since it is larger than the sum of its proper divisors (1).

82704475128631 is an equidigital number, since it uses as much as digits as its factorization.

82704475128631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18063360, while the sum is 58.

The spelling of 82704475128631 in words is "eighty-two trillion, seven hundred four billion, four hundred seventy-five million, one hundred twenty-eight thousand, six hundred thirty-one".