400005550501001 has 32 divisors (see below), whose sum is σ = 436964359864320. Its totient is φ = 364768438233600.

The previous prime is 400005550500991. The next prime is 400005550501043. The reversal of 400005550501001 is 100105055500004.

It is a de Polignac number, because none of the positive numbers 2^k-400005550501001 is a prime.

It is a super-2 number, since 2×400005550501001² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400005550531001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1054713530 + ... + 1055092716.

It is an arithmetic number, because the mean of its divisors is an integer number (13655136245760).

Almost surely, 2^{400005550501001} is an apocalyptic number.

It is an amenable number.

400005550501001 is a deficient number, since it is larger than the sum of its proper divisors (36958809363319).

400005550501001 is a wasteful number, since it uses less digits than its factorization.

400005550501001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388805.

The product of its (nonzero) digits is 2500, while the sum is 26.

The spelling of 400005550501001 in words is "four hundred trillion, five billion, five hundred fifty million, five hundred one thousand, one".