40405404051 has 24 divisors (see below), whose sum is σ = 59100926976. Its totient is φ = 26596900080.

The previous prime is 40405404023. The next prime is 40405404097. The reversal of 40405404051 is 15040450404.

40405404051 is a `hidden beast` number, since 40 + 40 + 540 + 40 + 5 + 1 = 666.

It is not a de Polignac number, because 40405404051 - 2⁷ = 40405403923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40405404001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1346946 + ... + 1376616.

It is an arithmetic number, because the mean of its divisors is an integer number (2462538624).

Almost surely, 2^40405404051 is an apocalyptic number.

40405404051 is a deficient number, since it is larger than the sum of its proper divisors (18695522925).

40405404051 is a wasteful number, since it uses less digits than its factorization.

40405404051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31583 (or 31580 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 40405404051 its reverse (15040450404), we get a palindrome (55445854455).

The spelling of 40405404051 in words is "forty billion, four hundred five million, four hundred four thousand, fifty-one".