40540405402 has 32 divisors (see below), whose sum is σ = 70164057600. Its totient is φ = 17208695808.

The previous prime is 40540405391. The next prime is 40540405487. The reversal of 40540405402 is 20450404504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 585999 + ... + 651517.

It is an arithmetic number, because the mean of its divisors is an integer number (2192626800).

Almost surely, 2^40540405402 is an apocalyptic number.

40540405402 is a deficient number, since it is larger than the sum of its proper divisors (29623652198).

40540405402 is a wasteful number, since it uses less digits than its factorization.

40540405402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65950.

The product of its (nonzero) digits is 12800, while the sum is 28.

Adding to 40540405402 its reverse (20450404504), we get a palindrome (60990809906).

The spelling of 40540405402 in words is "forty billion, five hundred forty million, four hundred five thousand, four hundred two".