401271838517 has 4 divisors (see below), whose sum is σ = 437751096576. Its totient is φ = 364792580460.

The previous prime is 401271838507. The next prime is 401271838529. The reversal of 401271838517 is 715838172104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 401271838517 - 2³⁶ = 332552361781 is a prime.

It is a super-2 number, since 2×401271838517² (a number of 24 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 (401271838507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18239629013 + ... + 18239629034.

It is an arithmetic number, because the mean of its divisors is an integer number (109437774144).

Almost surely, 2^401271838517 is an apocalyptic number.

It is an amenable number.

401271838517 is a deficient number, since it is larger than the sum of its proper divisors (36479258059).

401271838517 is a wasteful number, since it uses less digits than its factorization.

401271838517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36479258058.

The product of its (nonzero) digits is 376320, while the sum is 47.

The spelling of 401271838517 in words is "four hundred one billion, two hundred seventy-one million, eight hundred thirty-eight thousand, five hundred seventeen".