55945451491 has 2 divisors, whose sum is σ = 55945451492. Its totient is φ = 55945451490.

The previous prime is 55945451479. The next prime is 55945451581. The reversal of 55945451491 is 19415454955.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55945451491 - 2¹⁵ = 55945418723 is a prime.

It is not a weakly prime, because it can be changed into another prime (55945451291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27972725745 + 27972725746.

It is an arithmetic number, because the mean of its divisors is an integer number (27972725746).

Almost surely, 2^55945451491 is an apocalyptic number.

55945451491 is a deficient number, since it is larger than the sum of its proper divisors (1).

55945451491 is an equidigital number, since it uses as much as digits as its factorization.

55945451491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240000, while the sum is 52.

The spelling of 55945451491 in words is "fifty-five billion, nine hundred forty-five million, four hundred fifty-one thousand, four hundred ninety-one".