40208868429 has 4 divisors (see below), whose sum is σ = 53611824576. Its totient is φ = 26805912284.

The previous prime is 40208868391. The next prime is 40208868439. The reversal of 40208868429 is 92486880204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40208868429 - 2²¹ = 40206771277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40208868439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6701478069 + ... + 6701478074.

It is an arithmetic number, because the mean of its divisors is an integer number (13402956144).

Almost surely, 2^40208868429 is an apocalyptic number.

It is an amenable number.

40208868429 is a deficient number, since it is larger than the sum of its proper divisors (13402956147).

40208868429 is a wasteful number, since it uses less digits than its factorization.

40208868429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13402956146.

The product of its (nonzero) digits is 1769472, while the sum is 51.

The spelling of 40208868429 in words is "forty billion, two hundred eight million, eight hundred sixty-eight thousand, four hundred twenty-nine".