85198238064 has 120 divisors (see below), whose sum is σ = 243053452512. Its totient is φ = 27853701120.

The previous prime is 85198238057. The next prime is 85198238101. The reversal of 85198238064 is 46083289158.

It is a super-4 number, since 4×85198238064⁴ (a number of 45 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85198238064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1951644 + ... + 1994820.

Almost surely, 2^85198238064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85198238064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121526726256).

85198238064 is an abundant number, since it is smaller than the sum of its proper divisors (157855214448).

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

85198238064 is a wasteful number, since it uses less digits than its factorization.

85198238064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43455 (or 43446 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 85198238064 in words is "eighty-five billion, one hundred ninety-eight million, two hundred thirty-eight thousand, sixty-four".