55870242917 has 2 divisors, whose sum is σ = 55870242918. Its totient is φ = 55870242916.

The previous prime is 55870242907. The next prime is 55870242997. The reversal of 55870242917 is 71924207855.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41290646401 + 14579596516 = 203201^2 + 120746^2 .

It is a cyclic number.

It is not a de Polignac number, because 55870242917 - 2⁶ = 55870242853 is a prime.

It is a super-3 number, since 3×55870242917³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55870242907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27935121458 + 27935121459.

It is an arithmetic number, because the mean of its divisors is an integer number (27935121459).

Almost surely, 2^55870242917 is an apocalyptic number.

It is an amenable number.

55870242917 is a deficient number, since it is larger than the sum of its proper divisors (1).

55870242917 is an equidigital number, since it uses as much as digits as its factorization.

55870242917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1411200, while the sum is 50.

The spelling of 55870242917 in words is "fifty-five billion, eight hundred seventy million, two hundred forty-two thousand, nine hundred seventeen".