85511421400 has 96 divisors (see below), whose sum is σ = 200245554000. Its totient is φ = 33959116800.

The previous prime is 85511421397. The next prime is 85511421403. The reversal of 85511421400 is 412411558.

It is an interprime number because it is at equal distance from previous prime (85511421397) and next prime (85511421403).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85511421403) 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, 18945544 + ... + 18950056.

Almost surely, 2^85511421400 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 85511421400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100122777000).

85511421400 is an abundant number, since it is smaller than the sum of its proper divisors (114734132600).

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

85511421400 is a wasteful number, since it uses less digits than its factorization.

85511421400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5189 (or 5180 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

Adding to 85511421400 its reverse (412411558), we get a palindrome (85923832958).

The spelling of 85511421400 in words is "eighty-five billion, five hundred eleven million, four hundred twenty-one thousand, four hundred".