61028127449 has 2 divisors, whose sum is σ = 61028127450. Its totient is φ = 61028127448.

The previous prime is 61028127409. The next prime is 61028127491. The reversal of 61028127449 is 94472182016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59175427600 + 1852699849 = 243260^2 + 43043^2 .

It is a cyclic number.

It is not a de Polignac number, because 61028127449 - 2³² = 56733160153 is a prime.

It is not a weakly prime, because it can be changed into another prime (61028127409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30514063724 + 30514063725.

It is an arithmetic number, because the mean of its divisors is an integer number (30514063725).

Almost surely, 2^61028127449 is an apocalyptic number.

It is an amenable number.

61028127449 is a deficient number, since it is larger than the sum of its proper divisors (1).

61028127449 is an equidigital number, since it uses as much as digits as its factorization.

61028127449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 61028127449 in words is "sixty-one billion, twenty-eight million, one hundred twenty-seven thousand, four hundred forty-nine".