85381563620 has 12 divisors (see below), whose sum is σ = 179301283644. Its totient is φ = 34152625440.

The previous prime is 85381563613. The next prime is 85381563629. The reversal of 85381563620 is 2636518358.

It can be written as a sum of positive squares in 2 ways, for example, as 47287111936 + 38094451684 = 217456^2 + 195178^2 .

It is a super-2 number, since 2×85381563620² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85381563629) 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, 2134539071 + ... + 2134539110.

It is an arithmetic number, because the mean of its divisors is an integer number (14941773637).

Almost surely, 2^85381563620 is an apocalyptic number.

It is an amenable number.

85381563620 is an abundant number, since it is smaller than the sum of its proper divisors (93919720024).

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

85381563620 is a wasteful number, since it uses less digits than its factorization.

85381563620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269078190 (or 4269078188 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 85381563620 in words is "eighty-five billion, three hundred eighty-one million, five hundred sixty-three thousand, six hundred twenty".