40478721347 has 2 divisors, whose sum is σ = 40478721348. Its totient is φ = 40478721346.

The previous prime is 40478721337. The next prime is 40478721383. The reversal of 40478721347 is 74312787404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40478721347 - 2²⁰ = 40477672771 is a prime.

It is not a weakly prime, because it can be changed into another prime (40478721307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20239360673 + 20239360674.

It is an arithmetic number, because the mean of its divisors is an integer number (20239360674).

Almost surely, 2^40478721347 is an apocalyptic number.

40478721347 is a deficient number, since it is larger than the sum of its proper divisors (1).

40478721347 is an equidigital number, since it uses as much as digits as its factorization.

40478721347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1053696, while the sum is 47.

The spelling of 40478721347 in words is "forty billion, four hundred seventy-eight million, seven hundred twenty-one thousand, three hundred forty-seven".