85153963649 has 8 divisors (see below), whose sum is σ = 87493583208. Its totient is φ = 82816352640.

The previous prime is 85153963571. The next prime is 85153963673. The reversal of 85153963649 is 94636935158.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15065107600 + 70088856049 = 122740^2 + 264743^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85153963649 - 2³² = 80858996353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85159963649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415982 + ... + 585959.

It is an arithmetic number, because the mean of its divisors is an integer number (10936697901).

Almost surely, 2^85153963649 is an apocalyptic number.

It is an amenable number.

85153963649 is a deficient number, since it is larger than the sum of its proper divisors (2339619559).

85153963649 is a wasteful number, since it uses less digits than its factorization.

85153963649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004275.

The product of its digits is 20995200, while the sum is 59.

The spelling of 85153963649 in words is "eighty-five billion, one hundred fifty-three million, nine hundred sixty-three thousand, six hundred forty-nine".