85487758521 has 24 divisors (see below), whose sum is σ = 128343667872. Its totient is φ = 50547076800.

The previous prime is 85487758459. The next prime is 85487758583. The reversal of 85487758521 is 12585778458.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (85487758459) and next prime (85487758583).

It is not a de Polignac number, because 85487758521 - 2⁶ = 85487758457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85487758591) 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, 2857111 + ... + 2886876.

It is an arithmetic number, because the mean of its divisors is an integer number (5347652828).

Almost surely, 2^85487758521 is an apocalyptic number.

It is an amenable number.

85487758521 is a deficient number, since it is larger than the sum of its proper divisors (42855909351).

85487758521 is a wasteful number, since it uses less digits than its factorization.

85487758521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5744053 (or 5744042 counting only the distinct ones).

The product of its digits is 25088000, while the sum is 60.

The spelling of 85487758521 in words is "eighty-five billion, four hundred eighty-seven million, seven hundred fifty-eight thousand, five hundred twenty-one".