85017518501 has 4 divisors (see below), whose sum is σ = 87949157100. Its totient is φ = 82085879904.

The previous prime is 85017518497. The next prime is 85017518557. The reversal of 85017518501 is 10581571058.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51984456001 + 33033062500 = 228001^2 + 181750^2 .

It is a cyclic number.

It is not a de Polignac number, because 85017518501 - 2² = 85017518497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85017518591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1465819256 + ... + 1465819313.

It is an arithmetic number, because the mean of its divisors is an integer number (21987289275).

Almost surely, 2^85017518501 is an apocalyptic number.

It is an amenable number.

85017518501 is a deficient number, since it is larger than the sum of its proper divisors (2931638599).

85017518501 is a wasteful number, since it uses less digits than its factorization.

85017518501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931638598.

The product of its (nonzero) digits is 56000, while the sum is 41.

The spelling of 85017518501 in words is "eighty-five billion, seventeen million, five hundred eighteen thousand, five hundred one".