55651398639439 has 2 divisors, whose sum is σ = 55651398639440. Its totient is φ = 55651398639438.

The previous prime is 55651398639409. The next prime is 55651398639443. The reversal of 55651398639439 is 93493689315655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55651398639439 - 2³¹ = 55649251155791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55651398639409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27825699319719 + 27825699319720.

It is an arithmetic number, because the mean of its divisors is an integer number (27825699319720).

Almost surely, 2^{55651398639439} is an apocalyptic number.

55651398639439 is a deficient number, since it is larger than the sum of its proper divisors (1).

55651398639439 is an equidigital number, since it uses as much as digits as its factorization.

55651398639439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2834352000, while the sum is 76.

The spelling of 55651398639439 in words is "fifty-five trillion, six hundred fifty-one billion, three hundred ninety-eight million, six hundred thirty-nine thousand, four hundred thirty-nine".