40279785349 has 4 divisors (see below), whose sum is σ = 41262219180. Its totient is φ = 39297351520.

The previous prime is 40279785347. The next prime is 40279785353. The reversal of 40279785349 is 94358797204.

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 4234104900 + 36045680449 = 65070^2 + 189857^2 .

It is a cyclic number.

It is not a de Polignac number, because 40279785349 - 2¹ = 40279785347 is a prime.

It is a super-2 number, since 2×40279785349² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40279785293 and 40279785302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40279785341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491216854 + ... + 491216935.

It is an arithmetic number, because the mean of its divisors is an integer number (10315554795).

Almost surely, 2^40279785349 is an apocalyptic number.

It is an amenable number.

40279785349 is a deficient number, since it is larger than the sum of its proper divisors (982433831).

40279785349 is an equidigital number, since it uses as much as digits as its factorization.

40279785349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982433830.

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 40279785349 in words is "forty billion, two hundred seventy-nine million, seven hundred eighty-five thousand, three hundred forty-nine".