61376978726057 has 2 divisors, whose sum is σ = 61376978726058. Its totient is φ = 61376978726056.

The previous prime is 61376978726039. The next prime is 61376978726069. The reversal of 61376978726057 is 75062787967316.

61376978726057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43375448688016 + 18001530038041 = 6586004^2 + 4242821^2 .

It is a cyclic number.

It is not a de Polignac number, because 61376978726057 - 2¹⁰ = 61376978725033 is a prime.

It is not a weakly prime, because it can be changed into another prime (61376978726027) 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, 30688489363028 + 30688489363029.

It is an arithmetic number, because the mean of its divisors is an integer number (30688489363029).

Almost surely, 2^{61376978726057} is an apocalyptic number.

It is an amenable number.

61376978726057 is a deficient number, since it is larger than the sum of its proper divisors (1).

61376978726057 is an equidigital number, since it uses as much as digits as its factorization.

61376978726057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120210560, while the sum is 74.

The spelling of 61376978726057 in words is "sixty-one trillion, three hundred seventy-six billion, nine hundred seventy-eight million, seven hundred twenty-six thousand, fifty-seven".