400040400019 has 4 divisors (see below), whose sum is σ = 430812738496. Its totient is φ = 369268061544.

The previous prime is 400040399981. The next prime is 400040400047. The reversal of 400040400019 is 910004040004.

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 400040400019 - 2²³ = 400032011411 is a prime.

It is a super-3 number, since 3×400040400019³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400040400049) 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, 15386169219 + ... + 15386169244.

It is an arithmetic number, because the mean of its divisors is an integer number (107703184624).

Almost surely, 2^400040400019 is an apocalyptic number.

400040400019 is a deficient number, since it is larger than the sum of its proper divisors (30772338477).

400040400019 is a wasteful number, since it uses less digits than its factorization.

400040400019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30772338476.

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 400040400019 in words is "four hundred billion, forty million, four hundred thousand, nineteen".