855185501540413 has 2 divisors, whose sum is σ = 855185501540414. Its totient is φ = 855185501540412.

The previous prime is 855185501540371. The next prime is 855185501540431. The reversal of 855185501540413 is 314045105581558.

Together with next prime (855185501540431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 666302863742649 + 188882637797764 = 25812843^2 + 13743458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855185501540413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855185501580413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427592750770206 + 427592750770207.

It is an arithmetic number, because the mean of its divisors is an integer number (427592750770207).

Almost surely, 2^{855185501540413} is an apocalyptic number.

It is an amenable number.

855185501540413 is a deficient number, since it is larger than the sum of its proper divisors (1).

855185501540413 is an equidigital number, since it uses as much as digits as its factorization.

855185501540413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600000, while the sum is 55.

The spelling of 855185501540413 in words is "eight hundred fifty-five trillion, one hundred eighty-five billion, five hundred one million, five hundred forty thousand, four hundred thirteen".