400405235391001 has 8 divisors (see below), whose sum is σ = 403570703600640. Its totient is φ = 397239965167248.

The previous prime is 400405235390957. The next prime is 400405235391017. The reversal of 400405235391001 is 100193532504004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400405235391001 - 2³¹ = 400403087907353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400405235391061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45434386 + ... + 53526571.

It is an arithmetic number, because the mean of its divisors is an integer number (50446337950080).

Almost surely, 2^{400405235391001} is an apocalyptic number.

It is an amenable number.

400405235391001 is a deficient number, since it is larger than the sum of its proper divisors (3165468209639).

400405235391001 is a wasteful number, since it uses less digits than its factorization.

400405235391001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98992943.

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 400405235391001 its reverse (100193532504004), we get a palindrome (500598767895005).

The spelling of 400405235391001 in words is "four hundred trillion, four hundred five billion, two hundred thirty-five million, three hundred ninety-one thousand, one".