39941820469 has 4 divisors (see below), whose sum is σ = 40337284140. Its totient is φ = 39546356800.

The previous prime is 39941820427. The next prime is 39941820551. The reversal of 39941820469 is 96402814993.

39941820469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34456640625 + 5485179844 = 185625^2 + 74062^2 .

It is a cyclic number.

It is not a de Polignac number, because 39941820469 - 2¹¹ = 39941818421 is a prime.

It is a super-2 number, since 2×39941820469² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39941820419) 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, 197731684 + ... + 197731885.

It is an arithmetic number, because the mean of its divisors is an integer number (10084321035).

Almost surely, 2^39941820469 is an apocalyptic number.

It is an amenable number.

39941820469 is a deficient number, since it is larger than the sum of its proper divisors (395463671).

39941820469 is a wasteful number, since it uses less digits than its factorization.

39941820469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395463670.

The product of its (nonzero) digits is 3359232, while the sum is 55.

The spelling of 39941820469 in words is "thirty-nine billion, nine hundred forty-one million, eight hundred twenty thousand, four hundred sixty-nine".