77285485061 has 2 divisors, whose sum is σ = 77285485062. Its totient is φ = 77285485060.

The previous prime is 77285484973. The next prime is 77285485087. The reversal of 77285485061 is 16058458277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76104256900 + 1181228161 = 275870^2 + 34369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77285485061 is a prime.

It is a super-2 number, since 2×77285485061² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77285484994 and 77285485012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77285482061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38642742530 + 38642742531.

It is an arithmetic number, because the mean of its divisors is an integer number (38642742531).

Almost surely, 2^77285485061 is an apocalyptic number.

It is an amenable number.

77285485061 is a deficient number, since it is larger than the sum of its proper divisors (1).

77285485061 is an equidigital number, since it uses as much as digits as its factorization.

77285485061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 77285485061 in words is "seventy-seven billion, two hundred eighty-five million, four hundred eighty-five thousand, sixty-one".