85520890551 has 8 divisors (see below), whose sum is σ = 114077591920. Its totient is φ = 56989058112.

The previous prime is 85520890487. The next prime is 85520890589. The reversal of 85520890551 is 15509802558.

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

It is not a de Polignac number, because 85520890551 - 2⁶ = 85520890487 is a prime.

It is a super-2 number, since 2×85520890551² (a number of 23 digits) contains 22 as substring.

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 85520890551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85520890051) 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, 6209206 + ... + 6222963.

It is an arithmetic number, because the mean of its divisors is an integer number (14259698990).

Almost surely, 2^85520890551 is an apocalyptic number.

85520890551 is a deficient number, since it is larger than the sum of its proper divisors (28556701369).

85520890551 is a wasteful number, since it uses less digits than its factorization.

85520890551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12434465.

The product of its (nonzero) digits is 720000, while the sum is 48.

The spelling of 85520890551 in words is "eighty-five billion, five hundred twenty million, eight hundred ninety thousand, five hundred fifty-one".