40678452121 has 2 divisors, whose sum is σ = 40678452122. Its totient is φ = 40678452120.

The previous prime is 40678452071. The next prime is 40678452127. The reversal of 40678452121 is 12125487604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39386768521 + 1291683600 = 198461^2 + 35940^2 .

It is a cyclic number.

It is not a de Polignac number, because 40678452121 - 2⁷ = 40678451993 is a prime.

It is not a weakly prime, because it can be changed into another prime (40678452127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20339226060 + 20339226061.

It is an arithmetic number, because the mean of its divisors is an integer number (20339226061).

Almost surely, 2^40678452121 is an apocalyptic number.

It is an amenable number.

40678452121 is a deficient number, since it is larger than the sum of its proper divisors (1).

40678452121 is an equidigital number, since it uses as much as digits as its factorization.

40678452121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 40678452121 in words is "forty billion, six hundred seventy-eight million, four hundred fifty-two thousand, one hundred twenty-one".