55317356656091 has 2 divisors, whose sum is σ = 55317356656092. Its totient is φ = 55317356656090.

The previous prime is 55317356656049. The next prime is 55317356656123. The reversal of 55317356656091 is 19065665371355.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55317356656091 - 2⁶ = 55317356656027 is a prime.

It is a super-2 number, since 2×55317356656091² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55317356656391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27658678328045 + 27658678328046.

It is an arithmetic number, because the mean of its divisors is an integer number (27658678328046).

Almost surely, 2^{55317356656091} is an apocalyptic number.

55317356656091 is a deficient number, since it is larger than the sum of its proper divisors (1).

55317356656091 is an equidigital number, since it uses as much as digits as its factorization.

55317356656091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76545000, while the sum is 62.

The spelling of 55317356656091 in words is "fifty-five trillion, three hundred seventeen billion, three hundred fifty-six million, six hundred fifty-six thousand, ninety-one".