85391407449 has 48 divisors (see below), whose sum is σ = 128109549568. Its totient is φ = 54765559296.

The previous prime is 85391407441. The next prime is 85391407463. The reversal of 85391407449 is 94470419358.

85391407449 is a `hidden beast` number, since 8 + 53 + 9 + 140 + 7 + 449 = 666.

It is not a de Polignac number, because 85391407449 - 2³ = 85391407441 is a prime.

It is a super-2 number, since 2×85391407449² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85391407395 and 85391407404.

It is not an unprimeable number, because it can be changed into a prime (85391407441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12980049 + ... + 12986625.

Almost surely, 2^85391407449 is an apocalyptic number.

It is an amenable number.

85391407449 is a deficient number, since it is larger than the sum of its proper divisors (42718142119).

85391407449 is a wasteful number, since it uses less digits than its factorization.

85391407449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7054 (or 7051 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 85391407449 in words is "eighty-five billion, three hundred ninety-one million, four hundred seven thousand, four hundred forty-nine".