61758228139 has 2 divisors, whose sum is σ = 61758228140. Its totient is φ = 61758228138.

The previous prime is 61758228113. The next prime is 61758228143. The reversal of 61758228139 is 93182285716.

It is a happy number.

61758228139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61758228139 - 2¹¹ = 61758226091 is a prime.

It is not a weakly prime, because it can be changed into another prime (61758228149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30879114069 + 30879114070.

It is an arithmetic number, because the mean of its divisors is an integer number (30879114070).

Almost surely, 2^61758228139 is an apocalyptic number.

61758228139 is a deficient number, since it is larger than the sum of its proper divisors (1).

61758228139 is an equidigital number, since it uses as much as digits as its factorization.

61758228139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 52.

The spelling of 61758228139 in words is "sixty-one billion, seven hundred fifty-eight million, two hundred twenty-eight thousand, one hundred thirty-nine".