55554509951 has 2 divisors, whose sum is σ = 55554509952. Its totient is φ = 55554509950.

The previous prime is 55554509947. The next prime is 55554509957. The reversal of 55554509951 is 15990545555.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55554509951 - 2² = 55554509947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55554509893 and 55554509902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55554509957) 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, 27777254975 + 27777254976.

It is an arithmetic number, because the mean of its divisors is an integer number (27777254976).

Almost surely, 2^55554509951 is an apocalyptic number.

55554509951 is a deficient number, since it is larger than the sum of its proper divisors (1).

55554509951 is an equidigital number, since it uses as much as digits as its factorization.

55554509951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5062500, while the sum is 53.

The spelling of 55554509951 in words is "fifty-five billion, five hundred fifty-four million, five hundred nine thousand, nine hundred fifty-one".