401407491071 has 4 divisors (see below), whose sum is σ = 401424319392. Its totient is φ = 401390662752.

The previous prime is 401407491031. The next prime is 401407491073. The reversal of 401407491071 is 170194704104.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 401407491071 - 2¹⁰ = 401407490047 is a prime.

It is a super-2 number, since 2×401407491071² (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 (401407491073) 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, 8378330 + ... + 8426103.

It is an arithmetic number, because the mean of its divisors is an integer number (100356079848).

Almost surely, 2^401407491071 is an apocalyptic number.

401407491071 is a deficient number, since it is larger than the sum of its proper divisors (16828321).

401407491071 is a wasteful number, since it uses less digits than its factorization.

401407491071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16828320.

The product of its (nonzero) digits is 28224, while the sum is 38.

The spelling of 401407491071 in words is "four hundred one billion, four hundred seven million, four hundred ninety-one thousand, seventy-one".