400040004445 has 16 divisors (see below), whose sum is σ = 487717135488. Its totient is φ = 314929137600.

The previous prime is 400040004391. The next prime is 400040004461. The reversal of 400040004445 is 544400040004.

It is not a de Polignac number, because 400040004445 - 2³⁷ = 262601050973 is a prime.

It is a Duffinian number.

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, 293506 + ... + 941395.

It is an arithmetic number, because the mean of its divisors is an integer number (30482320968).

Almost surely, 2^400040004445 is an apocalyptic number.

It is an amenable number.

400040004445 is a deficient number, since it is larger than the sum of its proper divisors (87677131043).

400040004445 is a wasteful number, since it uses less digits than its factorization.

400040004445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235940.

The product of its (nonzero) digits is 5120, while the sum is 25.

Adding to 400040004445 its reverse (544400040004), we get a palindrome (944440044449).

The spelling of 400040004445 in words is "four hundred billion, forty million, four thousand, four hundred forty-five".