55816692091 has 2 divisors, whose sum is σ = 55816692092. Its totient is φ = 55816692090.

The previous prime is 55816692083. The next prime is 55816692121. The reversal of 55816692091 is 19029661855.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55816692091 - 2³ = 55816692083 is a prime.

It is not a weakly prime, because it can be changed into another prime (55816692011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27908346045 + 27908346046.

It is an arithmetic number, because the mean of its divisors is an integer number (27908346046).

Almost surely, 2^55816692091 is an apocalyptic number.

55816692091 is a deficient number, since it is larger than the sum of its proper divisors (1).

55816692091 is an equidigital number, since it uses as much as digits as its factorization.

55816692091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 52.

The spelling of 55816692091 in words is "fifty-five billion, eight hundred sixteen million, six hundred ninety-two thousand, ninety-one".