40478721368 has 16 divisors (see below), whose sum is σ = 75946497480. Its totient is φ = 20226322048.

The previous prime is 40478721347. The next prime is 40478721383. The reversal of 40478721368 is 86312787404.

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, 1616630 + ... + 1641477.

Almost surely, 2^40478721368 is an apocalyptic number.

It is an amenable number.

40478721368 is a deficient number, since it is larger than the sum of its proper divisors (35467776112).

40478721368 is a wasteful number, since it uses less digits than its factorization.

40478721368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259666 (or 3259662 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 50.

The spelling of 40478721368 in words is "forty billion, four hundred seventy-eight million, seven hundred twenty-one thousand, three hundred sixty-eight".