61474076849 has 2 divisors, whose sum is σ = 61474076850. Its totient is φ = 61474076848.

The previous prime is 61474076821. The next prime is 61474076857. The reversal of 61474076849 is 94867047416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53157913600 + 8316163249 = 230560^2 + 91193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61474076849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61474076794 and 61474076803.

It is not a weakly prime, because it can be changed into another prime (61474076819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30737038424 + 30737038425.

It is an arithmetic number, because the mean of its divisors is an integer number (30737038425).

Almost surely, 2^61474076849 is an apocalyptic number.

It is an amenable number.

61474076849 is a deficient number, since it is larger than the sum of its proper divisors (1).

61474076849 is an equidigital number, since it uses as much as digits as its factorization.

61474076849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 61474076849 in words is "sixty-one billion, four hundred seventy-four million, seventy-six thousand, eight hundred forty-nine".