40256656406 has 16 divisors (see below), whose sum is σ = 61303064064. Its totient is φ = 19822466664.

The previous prime is 40256656399. The next prime is 40256656409. The reversal of 40256656406 is 60465665204.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40256656409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472991 + ... + 551573.

It is an arithmetic number, because the mean of its divisors is an integer number (3831441504).

Almost surely, 2^40256656406 is an apocalyptic number.

40256656406 is a deficient number, since it is larger than the sum of its proper divisors (21046407658).

40256656406 is a wasteful number, since it uses less digits than its factorization.

40256656406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82475.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 40256656406 in words is "forty billion, two hundred fifty-six million, six hundred fifty-six thousand, four hundred six".