61364674475477 has 2 divisors, whose sum is σ = 61364674475478. Its totient is φ = 61364674475476.

The previous prime is 61364674475449. The next prime is 61364674475509. The reversal of 61364674475477 is 77457447646316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60576318720241 + 788355755236 = 7783079^2 + 887894^2 .

It is a cyclic number.

It is not a de Polignac number, because 61364674475477 - 2²⁴ = 61364657698261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61364674475477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61364674475677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30682337237738 + 30682337237739.

It is an arithmetic number, because the mean of its divisors is an integer number (30682337237739).

Almost surely, 2^{61364674475477} is an apocalyptic number.

It is an amenable number.

61364674475477 is a deficient number, since it is larger than the sum of its proper divisors (1).

61364674475477 is an equidigital number, since it uses as much as digits as its factorization.

61364674475477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1991485440, while the sum is 71.

The spelling of 61364674475477 in words is "sixty-one trillion, three hundred sixty-four billion, six hundred seventy-four million, four hundred seventy-five thousand, four hundred seventy-seven".