187561481461339 has 2 divisors, whose sum is σ = 187561481461340. Its totient is φ = 187561481461338.

The previous prime is 187561481461297. The next prime is 187561481461363. The reversal of 187561481461339 is 933164184165781.

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-187561481461339 is a prime.

It is not a weakly prime, because it can be changed into another prime (187561481462339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93780740730669 + 93780740730670.

It is an arithmetic number, because the mean of its divisors is an integer number (93780740730670).

Almost surely, 2^{187561481461339} is an apocalyptic number.

187561481461339 is a deficient number, since it is larger than the sum of its proper divisors (1).

187561481461339 is an equidigital number, since it uses as much as digits as its factorization.

187561481461339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104509440, while the sum is 67.

The spelling of 187561481461339 in words is "one hundred eighty-seven trillion, five hundred sixty-one billion, four hundred eighty-one million, four hundred sixty-one thousand, three hundred thirty-nine".