40338847886929 has 2 divisors, whose sum is σ = 40338847886930. Its totient is φ = 40338847886928.

The previous prime is 40338847886903. The next prime is 40338847886963. The reversal of 40338847886929 is 92968874883304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40252020424704 + 86827462225 = 6344448^2 + 294665^2 .

It is a cyclic number.

It is not a de Polignac number, because 40338847886929 - 2³³ = 40330257952337 is a prime.

It is not a weakly prime, because it can be changed into another prime (40338847881929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20169423943464 + 20169423943465.

It is an arithmetic number, because the mean of its divisors is an integer number (20169423943465).

Almost surely, 2^{40338847886929} is an apocalyptic number.

It is an amenable number.

40338847886929 is a deficient number, since it is larger than the sum of its proper divisors (1).

40338847886929 is an equidigital number, since it uses as much as digits as its factorization.

40338847886929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4013162496, while the sum is 79.

The spelling of 40338847886929 in words is "forty trillion, three hundred thirty-eight billion, eight hundred forty-seven million, eight hundred eighty-six thousand, nine hundred twenty-nine".