40478056646 has 8 divisors (see below), whose sum is σ = 63912721080. Its totient is φ = 19173816288.

The previous prime is 40478056637. The next prime is 40478056657. The reversal of 40478056646 is 64665087404.

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

It is a junction number, because it is equal to n+sod(n) for n = 40478056594 and 40478056603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532605971 + ... + 532606046.

It is an arithmetic number, because the mean of its divisors is an integer number (7989090135).

Almost surely, 2^40478056646 is an apocalyptic number.

40478056646 is a deficient number, since it is larger than the sum of its proper divisors (23434664434).

40478056646 is a wasteful number, since it uses less digits than its factorization.

40478056646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065212038.

The product of its (nonzero) digits is 3870720, while the sum is 50.

The spelling of 40478056646 in words is "forty billion, four hundred seventy-eight million, fifty-six thousand, six hundred forty-six".