61145564455357 has 2 divisors, whose sum is σ = 61145564455358. Its totient is φ = 61145564455356.

The previous prime is 61145564455307. The next prime is 61145564455373. The reversal of 61145564455357 is 75355446554116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32651384511321 + 28494179944036 = 5714139^2 + 5337994^2 .

It is a cyclic number.

It is not a de Polignac number, because 61145564455357 - 2²⁷ = 61145430237629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61145564455295 and 61145564455304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61145564455307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30572782227678 + 30572782227679.

It is an arithmetic number, because the mean of its divisors is an integer number (30572782227679).

Almost surely, 2^{61145564455357} is an apocalyptic number.

It is an amenable number.

61145564455357 is a deficient number, since it is larger than the sum of its proper divisors (1).

61145564455357 is an equidigital number, since it uses as much as digits as its factorization.

61145564455357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200000, while the sum is 61.

The spelling of 61145564455357 in words is "sixty-one trillion, one hundred forty-five billion, five hundred sixty-four million, four hundred fifty-five thousand, three hundred fifty-seven".