43951440646 has 8 divisors (see below), whose sum is σ = 68793559344. Its totient is φ = 21020254200.

The previous prime is 43951440641. The next prime is 43951440647. The reversal of 43951440646 is 64604415934.

43951440646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 955466101 = 43951440646 / (4 + 3 + 9 + 5 + 1 + 4 + 4 + 0 + 6 + 4 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 43951440596 and 43951440605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43951440641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477733005 + ... + 477733096.

It is an arithmetic number, because the mean of its divisors is an integer number (8599194918).

Almost surely, 2^43951440646 is an apocalyptic number.

43951440646 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

43951440646 is a deficient number, since it is larger than the sum of its proper divisors (24842118698).

43951440646 is a wasteful number, since it uses less digits than its factorization.

43951440646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955466126.

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 43951440646 in words is "forty-three billion, nine hundred fifty-one million, four hundred forty thousand, six hundred forty-six".