85535453557 has 2 divisors, whose sum is σ = 85535453558. Its totient is φ = 85535453556.

The previous prime is 85535453519. The next prime is 85535453561. The reversal of 85535453557 is 75535453558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63038153476 + 22497300081 = 251074^2 + 149991^2 .

It is a cyclic number.

It is not a de Polignac number, because 85535453557 - 2¹¹ = 85535451509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85535453498 and 85535453507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85535453257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42767726778 + 42767726779.

It is an arithmetic number, because the mean of its divisors is an integer number (42767726779).

Almost surely, 2^85535453557 is an apocalyptic number.

It is an amenable number.

85535453557 is a deficient number, since it is larger than the sum of its proper divisors (1).

85535453557 is an equidigital number, since it uses as much as digits as its factorization.

85535453557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31500000, while the sum is 55.

Subtracting from 85535453557 its reverse (75535453558), we obtain a palindrome (9999999999).

The spelling of 85535453557 in words is "eighty-five billion, five hundred thirty-five million, four hundred fifty-three thousand, five hundred fifty-seven".