40990768609 has 4 divisors (see below), whose sum is σ = 46846592704. Its totient is φ = 35134944516.

The previous prime is 40990768603. The next prime is 40990768619. The reversal of 40990768609 is 90686709904.

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 not a de Polignac number, because 40990768609 - 2³ = 40990768601 is a prime.

It is a super-2 number, since 2×40990768609² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40990768601) 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, 2927912037 + ... + 2927912050.

It is an arithmetic number, because the mean of its divisors is an integer number (11711648176).

Almost surely, 2^40990768609 is an apocalyptic number.

It is an amenable number.

40990768609 is a deficient number, since it is larger than the sum of its proper divisors (5855824095).

40990768609 is an equidigital number, since it uses as much as digits as its factorization.

40990768609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5855824094.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The spelling of 40990768609 in words is "forty billion, nine hundred ninety million, seven hundred sixty-eight thousand, six hundred nine".