40626561 has 8 divisors (see below), whose sum is σ = 54241920. Its totient is φ = 27047792.

The previous prime is 40626557. The next prime is 40626563. The reversal of 40626561 is 16562604.

40626561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40626561 - 2² = 40626557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40626563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6441 + ... + 11078.

It is an arithmetic number, because the mean of its divisors is an integer number (6780240).

Almost surely, 2^40626561 is an apocalyptic number.

It is an amenable number.

40626561 is a deficient number, since it is larger than the sum of its proper divisors (13615359).

40626561 is a wasteful number, since it uses less digits than its factorization.

40626561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18295.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 40626561 is about 6373.8968457295. The cubic root of 40626561 is about 343.7716197532.

The spelling of 40626561 in words is "forty million, six hundred twenty-six thousand, five hundred sixty-one".