77656470732331 has 2 divisors, whose sum is σ = 77656470732332. Its totient is φ = 77656470732330.

The previous prime is 77656470732199. The next prime is 77656470732377. The reversal of 77656470732331 is 13323707465677.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77656470732331 - 2¹⁹ = 77656470208043 is a prime.

It is a super-2 number, since 2×77656470732331² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77656470732331.

It is not a weakly prime, because it can be changed into another prime (77656470732931) 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 as a sum of consecutive naturals, namely, 38828235366165 + 38828235366166.

It is an arithmetic number, because the mean of its divisors is an integer number (38828235366166).

Almost surely, 2^{77656470732331} is an apocalyptic number.

77656470732331 is a deficient number, since it is larger than the sum of its proper divisors (1).

77656470732331 is an equidigital number, since it uses as much as digits as its factorization.

77656470732331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93350880, while the sum is 61.

The spelling of 77656470732331 in words is "seventy-seven trillion, six hundred fifty-six billion, four hundred seventy million, seven hundred thirty-two thousand, three hundred thirty-one".