55908129691 has 2 divisors, whose sum is σ = 55908129692. Its totient is φ = 55908129690.

The previous prime is 55908129677. The next prime is 55908129749. The reversal of 55908129691 is 19692180955.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55908129691 - 2¹³ = 55908121499 is a prime.

It is not a weakly prime, because it can be changed into another prime (55908124691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27954064845 + 27954064846.

It is an arithmetic number, because the mean of its divisors is an integer number (27954064846).

Almost surely, 2^55908129691 is an apocalyptic number.

55908129691 is a deficient number, since it is larger than the sum of its proper divisors (1).

55908129691 is an equidigital number, since it uses as much as digits as its factorization.

55908129691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1749600, while the sum is 55.

The spelling of 55908129691 in words is "fifty-five billion, nine hundred eight million, one hundred twenty-nine thousand, six hundred ninety-one".