77770602736061 has 2 divisors, whose sum is σ = 77770602736062. Its totient is φ = 77770602736060.

The previous prime is 77770602736051. The next prime is 77770602736103. The reversal of 77770602736061 is 16063720607777.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73243112451961 + 4527490284100 = 8558219^2 + 2127790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77770602736061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77770602736051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38885301368030 + 38885301368031.

It is an arithmetic number, because the mean of its divisors is an integer number (38885301368031).

Almost surely, 2^{77770602736061} is an apocalyptic number.

It is an amenable number.

77770602736061 is a deficient number, since it is larger than the sum of its proper divisors (1).

77770602736061 is an equidigital number, since it uses as much as digits as its factorization.

77770602736061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21781872, while the sum is 59.

The spelling of 77770602736061 in words is "seventy-seven trillion, seven hundred seventy billion, six hundred two million, seven hundred thirty-six thousand, sixty-one".