855061391293 has 2 divisors, whose sum is σ = 855061391294. Its totient is φ = 855061391292.

The previous prime is 855061391281. The next prime is 855061391311. The reversal of 855061391293 is 392193160558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 491068782169 + 363992609124 = 700763^2 + 603318^2 .

It is a cyclic number.

It is not a de Polignac number, because 855061391293 - 2¹³ = 855061383101 is a prime.

It is a super-2 number, since 2×855061391293² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 855061391293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855061391693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427530695646 + 427530695647.

It is an arithmetic number, because the mean of its divisors is an integer number (427530695647).

Almost surely, 2^855061391293 is an apocalyptic number.

It is an amenable number.

855061391293 is a deficient number, since it is larger than the sum of its proper divisors (1).

855061391293 is an equidigital number, since it uses as much as digits as its factorization.

855061391293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1749600, while the sum is 52.

The spelling of 855061391293 in words is "eight hundred fifty-five billion, sixty-one million, three hundred ninety-one thousand, two hundred ninety-three".