61477375782013 has 2 divisors, whose sum is σ = 61477375782014. Its totient is φ = 61477375782012.

The previous prime is 61477375782001. The next prime is 61477375782037. The reversal of 61477375782013 is 31028757377416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42070505047684 + 19406870734329 = 6486178^2 + 4405323^2 .

It is a cyclic number.

It is not a de Polignac number, because 61477375782013 - 2⁵ = 61477375781981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61477375780013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30738687891006 + 30738687891007.

It is an arithmetic number, because the mean of its divisors is an integer number (30738687891007).

Almost surely, 2^{61477375782013} is an apocalyptic number.

It is an amenable number.

61477375782013 is a deficient number, since it is larger than the sum of its proper divisors (1).

61477375782013 is an equidigital number, since it uses as much as digits as its factorization.

61477375782013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41489280, while the sum is 61.

The spelling of 61477375782013 in words is "sixty-one trillion, four hundred seventy-seven billion, three hundred seventy-five million, seven hundred eighty-two thousand, thirteen".