40455648021838 has 16 divisors (see below), whose sum is σ = 70131781484640. Its totient is φ = 17143324361856.

The previous prime is 40455648021757. The next prime is 40455648021847. The reversal of 40455648021838 is 83812084655404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16234207431 + ... + 16234209922.

It is an arithmetic number, because the mean of its divisors is an integer number (4383236342790).

Almost surely, 2^{40455648021838} is an apocalyptic number.

40455648021838 is a deficient number, since it is larger than the sum of its proper divisors (29676133462802).

40455648021838 is a wasteful number, since it uses less digits than its factorization.

40455648021838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32468417451.

The product of its (nonzero) digits is 29491200, while the sum is 58.

The spelling of 40455648021838 in words is "forty trillion, four hundred fifty-five billion, six hundred forty-eight million, twenty-one thousand, eight hundred thirty-eight".