85964619640 has 32 divisors (see below), whose sum is σ = 198137968560. Its totient is φ = 33547168000.

The previous prime is 85964619623. The next prime is 85964619731. The reversal of 85964619640 is 4691646958.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26207086 + ... + 26210365.

Almost surely, 2^85964619640 is an apocalyptic number.

It is an amenable number.

85964619640 is an abundant number, since it is smaller than the sum of its proper divisors (112173348920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85964619640 is a wasteful number, since it uses less digits than its factorization.

85964619640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52417503 (or 52417499 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 58.

The spelling of 85964619640 in words is "eighty-five billion, nine hundred sixty-four million, six hundred nineteen thousand, six hundred forty".