55856665373 has 2 divisors, whose sum is σ = 55856665374. Its totient is φ = 55856665372.

The previous prime is 55856665369. The next prime is 55856665399. The reversal of 55856665373 is 37356665855.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30214087684 + 25642577689 = 173822^2 + 160133^2 .

It is a cyclic number.

It is not a de Polignac number, because 55856665373 - 2² = 55856665369 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55856665273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27928332686 + 27928332687.

It is an arithmetic number, because the mean of its divisors is an integer number (27928332687).

Almost surely, 2^55856665373 is an apocalyptic number.

It is an amenable number.

55856665373 is a deficient number, since it is larger than the sum of its proper divisors (1).

55856665373 is an equidigital number, since it uses as much as digits as its factorization.

55856665373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040000, while the sum is 59.

The spelling of 55856665373 in words is "fifty-five billion, eight hundred fifty-six million, six hundred sixty-five thousand, three hundred seventy-three".