61364960477 has 2 divisors, whose sum is σ = 61364960478. Its totient is φ = 61364960476.

The previous prime is 61364960467. The next prime is 61364960513. The reversal of 61364960477 is 77406946316.

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., 58017875161 + 3347085316 = 240869^2 + 57854^2 .

It is a cyclic number.

It is not a de Polignac number, because 61364960477 - 2²⁰ = 61363911901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61364960467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30682480238 + 30682480239.

It is an arithmetic number, because the mean of its divisors is an integer number (30682480239).

Almost surely, 2^61364960477 is an apocalyptic number.

It is an amenable number.

61364960477 is a deficient number, since it is larger than the sum of its proper divisors (1).

61364960477 is an equidigital number, since it uses as much as digits as its factorization.

61364960477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 53.

The spelling of 61364960477 in words is "sixty-one billion, three hundred sixty-four million, nine hundred sixty thousand, four hundred seventy-seven".