401440115015 has 16 divisors (see below), whose sum is σ = 487955080800. Its totient is φ = 317022705792.

The previous prime is 401440114973. The next prime is 401440115101. The reversal of 401440115015 is 510511044104.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401440115015 is a prime.

It is a super-2 number, since 2×401440115015² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1222517 + ... + 1515726.

It is an arithmetic number, because the mean of its divisors is an integer number (30497192550).

Almost surely, 2^401440115015 is an apocalyptic number.

401440115015 is a deficient number, since it is larger than the sum of its proper divisors (86514965785).

401440115015 is a wasteful number, since it uses less digits than its factorization.

401440115015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738626.

The product of its (nonzero) digits is 1600, while the sum is 26.

Adding to 401440115015 its reverse (510511044104), we get a palindrome (911951159119).

The spelling of 401440115015 in words is "four hundred one billion, four hundred forty million, one hundred fifteen thousand, fifteen".