40206536429 has 2 divisors, whose sum is σ = 40206536430. Its totient is φ = 40206536428.

The previous prime is 40206536411. The next prime is 40206536431. The reversal of 40206536429 is 92463560204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24001755625 + 16204780804 = 154925^2 + 127298^2 .

It is a cyclic number.

It is not a de Polignac number, because 40206536429 - 2²⁰ = 40205487853 is a prime.

Together with 40206536431, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40206506429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20103268214 + 20103268215.

It is an arithmetic number, because the mean of its divisors is an integer number (20103268215).

Almost surely, 2^40206536429 is an apocalyptic number.

It is an amenable number.

40206536429 is a deficient number, since it is larger than the sum of its proper divisors (1).

40206536429 is an equidigital number, since it uses as much as digits as its factorization.

40206536429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 40206536429 in words is "forty billion, two hundred six million, five hundred thirty-six thousand, four hundred twenty-nine".