85511421427 has 2 divisors, whose sum is σ = 85511421428. Its totient is φ = 85511421426.

The previous prime is 85511421409. The next prime is 85511421439. The reversal of 85511421427 is 72412411558.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85511421427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85511421427.

It is not a weakly prime, because it can be changed into another prime (85511422427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42755710713 + 42755710714.

It is an arithmetic number, because the mean of its divisors is an integer number (42755710714).

Almost surely, 2^85511421427 is an apocalyptic number.

85511421427 is a deficient number, since it is larger than the sum of its proper divisors (1).

85511421427 is an equidigital number, since it uses as much as digits as its factorization.

85511421427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 89600, while the sum is 40.

The spelling of 85511421427 in words is "eighty-five billion, five hundred eleven million, four hundred twenty-one thousand, four hundred twenty-seven".