40405000747 has 2 divisors, whose sum is σ = 40405000748. Its totient is φ = 40405000746.

The previous prime is 40405000693. The next prime is 40405000777. The reversal of 40405000747 is 74700050404.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40405000747 is a prime.

It is not a weakly prime, because it can be changed into another prime (40405000777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20202500373 + 20202500374.

It is an arithmetic number, because the mean of its divisors is an integer number (20202500374).

Almost surely, 2^40405000747 is an apocalyptic number.

40405000747 is a deficient number, since it is larger than the sum of its proper divisors (1).

40405000747 is an equidigital number, since it uses as much as digits as its factorization.

40405000747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 31.

The spelling of 40405000747 in words is "forty billion, four hundred five million, seven hundred forty-seven", and thus it is an aban number.