40690426509065 has 32 divisors (see below), whose sum is σ = 52709560012800. Its totient is φ = 30062691957760.

The previous prime is 40690426509059. The next prime is 40690426509067. The reversal of 40690426509065 is 56090562409604.

It is a happy number.

40690426509065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40690426509065 - 2²² = 40690422314761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40690426509065.

It is not an unprimeable number, because it can be changed into a prime (40690426509067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205440401 + ... + 205638369.

It is an arithmetic number, because the mean of its divisors is an integer number (1647173750400).

Almost surely, 2^{40690426509065} is an apocalyptic number.

It is an amenable number.

40690426509065 is a deficient number, since it is larger than the sum of its proper divisors (12019133503735).

40690426509065 is a wasteful number, since it uses less digits than its factorization.

40690426509065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259657.

The product of its (nonzero) digits is 13996800, while the sum is 56.

The spelling of 40690426509065 in words is "forty trillion, six hundred ninety billion, four hundred twenty-six million, five hundred nine thousand, sixty-five".