85008380005381 has 24 divisors (see below), whose sum is σ = 104705497917720. Its totient is φ = 68577338253312.

The previous prime is 85008380005343. The next prime is 85008380005397. The reversal of 85008380005381 is 18350008380058.

It can be written as a sum of positive squares in 4 ways, for example, as 212552349156 + 84795827656225 = 461034^2 + 9208465^2 .

It is not a de Polignac number, because 85008380005381 - 2²⁷ = 85008245787653 is a prime.

It is a super-2 number, since 2×85008380005381² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85008380005181) 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, 71492325 + ... + 72671653.

It is an arithmetic number, because the mean of its divisors is an integer number (4362729079905).

Almost surely, 2^{85008380005381} is an apocalyptic number.

It is an amenable number.

85008380005381 is a deficient number, since it is larger than the sum of its proper divisors (19697117912339).

85008380005381 is a wasteful number, since it uses less digits than its factorization.

85008380005381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265893 (or 1265886 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 49.

The spelling of 85008380005381 in words is "eighty-five trillion, eight billion, three hundred eighty million, five thousand, three hundred eighty-one".