40556026609 has 4 divisors (see below), whose sum is σ = 46349744704. Its totient is φ = 34762308516.

The previous prime is 40556026583. The next prime is 40556026631. The reversal of 40556026609 is 90662065504.

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 a de Polignac number, because none of the positive numbers 2^k-40556026609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40556026639) 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, 2896859037 + ... + 2896859050.

It is an arithmetic number, because the mean of its divisors is an integer number (11587436176).

Almost surely, 2^40556026609 is an apocalyptic number.

It is an amenable number.

40556026609 is a deficient number, since it is larger than the sum of its proper divisors (5793718095).

40556026609 is an equidigital number, since it uses as much as digits as its factorization.

40556026609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5793718094.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 40556026609 in words is "forty billion, five hundred fifty-six million, twenty-six thousand, six hundred nine".