55551513361447 has 2 divisors, whose sum is σ = 55551513361448. Its totient is φ = 55551513361446.

The previous prime is 55551513361397. The next prime is 55551513361501. The reversal of 55551513361447 is 74416331515555.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55551513361447 - 2³⁵ = 55517153623079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55551513361247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27775756680723 + 27775756680724.

It is an arithmetic number, because the mean of its divisors is an integer number (27775756680724).

Almost surely, 2^{55551513361447} is an apocalyptic number.

55551513361447 is a deficient number, since it is larger than the sum of its proper divisors (1).

55551513361447 is an equidigital number, since it uses as much as digits as its factorization.

55551513361447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900000, while the sum is 55.

The spelling of 55551513361447 in words is "fifty-five trillion, five hundred fifty-one billion, five hundred thirteen million, three hundred sixty-one thousand, four hundred forty-seven".