85771901495 has 24 divisors (see below), whose sum is σ = 124146954144. Its totient is φ = 55719482688.

The previous prime is 85771901491. The next prime is 85771901549. The reversal of 85771901495 is 59410917758.

It is a happy number.

It is not a de Polignac number, because 85771901495 - 2² = 85771901491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85771901495.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85771901491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3381584 + ... + 3406853.

It is an arithmetic number, because the mean of its divisors is an integer number (5172789756).

Almost surely, 2^85771901495 is an apocalyptic number.

85771901495 is a deficient number, since it is larger than the sum of its proper divisors (38375052649).

85771901495 is a wasteful number, since it uses less digits than its factorization.

85771901495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6788487 (or 6788468 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 56.

The spelling of 85771901495 in words is "eighty-five billion, seven hundred seventy-one million, nine hundred one thousand, four hundred ninety-five".