9401670473581 has 4 divisors (see below), whose sum is σ = 9630979509564. Its totient is φ = 9172361437600.

The previous prime is 9401670473561. The next prime is 9401670473597. The reversal of 9401670473581 is 1853740761049.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 328261389481 + 9073409084100 = 572941^2 + 3012210^2 .

It is a cyclic number.

It is not a de Polignac number, because 9401670473581 - 2⁵ = 9401670473549 is a prime.

It is a super-2 number, since 2×9401670473581² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9401670473561) 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, 114654517930 + ... + 114654518011.

It is an arithmetic number, because the mean of its divisors is an integer number (2407744877391).

Almost surely, 2^{9401670473581} is an apocalyptic number.

It is an amenable number.

9401670473581 is a deficient number, since it is larger than the sum of its proper divisors (229309035983).

9401670473581 is a wasteful number, since it uses less digits than its factorization.

9401670473581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229309035982.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 9401670473581 in words is "nine trillion, four hundred one billion, six hundred seventy million, four hundred seventy-three thousand, five hundred eighty-one".