55390370551 has 2 divisors, whose sum is σ = 55390370552. Its totient is φ = 55390370550.

The previous prime is 55390370531. The next prime is 55390370573. The reversal of 55390370551 is 15507309355.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55390370551 - 2¹⁷ = 55390239479 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55390370498 and 55390370507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55390370531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27695185275 + 27695185276.

It is an arithmetic number, because the mean of its divisors is an integer number (27695185276).

Almost surely, 2^55390370551 is an apocalyptic number.

55390370551 is a deficient number, since it is larger than the sum of its proper divisors (1).

55390370551 is an equidigital number, since it uses as much as digits as its factorization.

55390370551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 354375, while the sum is 43.

The spelling of 55390370551 in words is "fifty-five billion, three hundred ninety million, three hundred seventy thousand, five hundred fifty-one".