61278050227 has 2 divisors, whose sum is σ = 61278050228. Its totient is φ = 61278050226.

The previous prime is 61278050209. The next prime is 61278050237. The reversal of 61278050227 is 72205087216.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61278050227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61278050227.

It is not a weakly prime, because it can be changed into another prime (61278050237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30639025113 + 30639025114.

It is an arithmetic number, because the mean of its divisors is an integer number (30639025114).

Almost surely, 2^61278050227 is an apocalyptic number.

61278050227 is a deficient number, since it is larger than the sum of its proper divisors (1).

61278050227 is an equidigital number, since it uses as much as digits as its factorization.

61278050227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 61278050227 in words is "sixty-one billion, two hundred seventy-eight million, fifty thousand, two hundred twenty-seven".