61477506535139 has 2 divisors, whose sum is σ = 61477506535140. Its totient is φ = 61477506535138.

The previous prime is 61477506535051. The next prime is 61477506535157. The reversal of 61477506535139 is 93153560577416.

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-61477506535139 is a prime.

It is not a weakly prime, because it can be changed into another prime (61477566535139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30738753267569 + 30738753267570.

It is an arithmetic number, because the mean of its divisors is an integer number (30738753267570).

Almost surely, 2^{61477506535139} is an apocalyptic number.

61477506535139 is a deficient number, since it is larger than the sum of its proper divisors (1).

61477506535139 is an equidigital number, since it uses as much as digits as its factorization.

61477506535139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71442000, while the sum is 62.

The spelling of 61477506535139 in words is "sixty-one trillion, four hundred seventy-seven billion, five hundred six million, five hundred thirty-five thousand, one hundred thirty-nine".