40400400045 has 16 divisors (see below), whose sum is σ = 65037212352. Its totient is φ = 21414689280.

The previous prime is 40400400043. The next prime is 40400400077. The reversal of 40400400045 is 54000400404.

It is not a de Polignac number, because 40400400045 - 2¹ = 40400400043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40400399994 and 40400400030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400400043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8259396 + ... + 8264285.

It is an arithmetic number, because the mean of its divisors is an integer number (4064825772).

Almost surely, 2^40400400045 is an apocalyptic number.

It is an amenable number.

40400400045 is a deficient number, since it is larger than the sum of its proper divisors (24636812307).

40400400045 is a wasteful number, since it uses less digits than its factorization.

40400400045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16523852.

The product of its (nonzero) digits is 1280, while the sum is 21.

Adding to 40400400045 its reverse (54000400404), we get a palindrome (94400800449).

The spelling of 40400400045 in words is "forty billion, four hundred million, four hundred thousand, forty-five".