40720409478 has 256 divisors, whose sum is σ = 109947801600. Its totient is φ = 10921236480.

The previous prime is 40720409453. The next prime is 40720409549. The reversal of 40720409478 is 87490402704.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 177818268 + ... + 177818496.

It is an arithmetic number, because the mean of its divisors is an integer number (429483600).

Almost surely, 2^40720409478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40720409478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54973900800).

40720409478 is an abundant number, since it is smaller than the sum of its proper divisors (69227392122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40720409478 is a wasteful number, since it uses less digits than its factorization.

40720409478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 40720409478 in words is "forty billion, seven hundred twenty million, four hundred nine thousand, four hundred seventy-eight".