40208690349 has 12 divisors (see below), whose sum is σ = 58087405116. Its totient is φ = 26802015552.

The previous prime is 40208690299. The next prime is 40208690381. The reversal of 40208690349 is 94309680204.

40208690349 is a `hidden beast` number, since 40 + 208 + 69 + 0 + 349 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 35941334724 + 4267355625 = 189582^2 + 65325^2 .

It is not a de Polignac number, because 40208690349 - 2¹¹ = 40208688301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40208690449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 246654 + ... + 375839.

It is an arithmetic number, because the mean of its divisors is an integer number (4840617093).

Almost surely, 2^40208690349 is an apocalyptic number.

It is an amenable number.

40208690349 is a deficient number, since it is larger than the sum of its proper divisors (17878714767).

40208690349 is a wasteful number, since it uses less digits than its factorization.

40208690349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629676 (or 629673 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 40208690349 in words is "forty billion, two hundred eight million, six hundred ninety thousand, three hundred forty-nine".