3805400165281 has 16 divisors (see below), whose sum is σ = 4473069689088. Its totient is φ = 3191635814400.

The previous prime is 3805400165239. The next prime is 3805400165291. The reversal of 3805400165281 is 1825610045083.

It is not a de Polignac number, because 3805400165281 - 2⁷ = 3805400165153 is a prime.

It is a super-2 number, since 2×3805400165281² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3805400165291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6843936 + ... + 7379041.

It is an arithmetic number, because the mean of its divisors is an integer number (279566855568).

Almost surely, 2^{3805400165281} is an apocalyptic number.

It is an amenable number.

3805400165281 is a deficient number, since it is larger than the sum of its proper divisors (667669523807).

3805400165281 is a wasteful number, since it uses less digits than its factorization.

3805400165281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14224872.

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 3805400165281 in words is "three trillion, eight hundred five billion, four hundred million, one hundred sixty-five thousand, two hundred eighty-one".