61686834832387 has 2 divisors, whose sum is σ = 61686834832388. Its totient is φ = 61686834832386.

The previous prime is 61686834832361. The next prime is 61686834832457. The reversal of 61686834832387 is 78323843868616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61686834832387 - 2²⁷ = 61686700614659 is a prime.

It is not a weakly prime, because it can be changed into another prime (61686864832387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30843417416193 + 30843417416194.

It is an arithmetic number, because the mean of its divisors is an integer number (30843417416194).

Almost surely, 2^{61686834832387} is an apocalyptic number.

61686834832387 is a deficient number, since it is larger than the sum of its proper divisors (1).

61686834832387 is an equidigital number, since it uses as much as digits as its factorization.

61686834832387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1337720832, while the sum is 73.

The spelling of 61686834832387 in words is "sixty-one trillion, six hundred eighty-six billion, eight hundred thirty-four million, eight hundred thirty-two thousand, three hundred eighty-seven".