85455989919 has 6 divisors (see below), whose sum is σ = 123436429896. Its totient is φ = 56970659940.

The previous prime is 85455989911. The next prime is 85455989923. The reversal of 85455989919 is 91998955458.

85455989919 is a `hidden beast` number, since 8 + 5 + 455 + 9 + 89 + 91 + 9 = 666.

It is not a de Polignac number, because 85455989919 - 2³ = 85455989911 is a prime.

It is a super-2 number, since 2×85455989919² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85455989911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4747554987 + ... + 4747555004.

It is an arithmetic number, because the mean of its divisors is an integer number (20572738316).

Almost surely, 2^85455989919 is an apocalyptic number.

85455989919 is a deficient number, since it is larger than the sum of its proper divisors (37980439977).

85455989919 is a wasteful number, since it uses less digits than its factorization.

85455989919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9495109997 (or 9495109994 counting only the distinct ones).

The product of its digits is 209952000, while the sum is 72.

The spelling of 85455989919 in words is "eighty-five billion, four hundred fifty-five million, nine hundred eighty-nine thousand, nine hundred nineteen".