85457854381 has 2 divisors, whose sum is σ = 85457854382. Its totient is φ = 85457854380.

The previous prime is 85457854369. The next prime is 85457854439. The reversal of 85457854381 is 18345875458.

It is an a-pointer prime, because the next prime (85457854439) can be obtained adding 85457854381 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82616004900 + 2841849481 = 287430^2 + 53309^2 .

It is a cyclic number.

It is not a de Polignac number, because 85457854381 - 2²¹ = 85455757229 is a prime.

It is a super-2 number, since 2×85457854381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85457894381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42728927190 + 42728927191.

It is an arithmetic number, because the mean of its divisors is an integer number (42728927191).

Almost surely, 2^85457854381 is an apocalyptic number.

It is an amenable number.

85457854381 is a deficient number, since it is larger than the sum of its proper divisors (1).

85457854381 is an equidigital number, since it uses as much as digits as its factorization.

85457854381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504000, while the sum is 58.

The spelling of 85457854381 in words is "eighty-five billion, four hundred fifty-seven million, eight hundred fifty-four thousand, three hundred eighty-one".