40643954402689 has 96 divisors (see below), whose sum is σ = 49118791962240. Its totient is φ = 33467841792000.

The previous prime is 40643954402651. The next prime is 40643954402819. The reversal of 40643954402689 is 98620445934604.

40643954402689 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 40643954402689 - 2¹⁷ = 40643954271617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40643954402689.

It is not an unprimeable number, because it can be changed into a prime (40643954402629) 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 95 ways as a sum of consecutive naturals, for example, 1745038134 + ... + 1745061424.

It is an arithmetic number, because the mean of its divisors is an integer number (511654082940).

Almost surely, 2^{40643954402689} is an apocalyptic number.

It is an amenable number.

40643954402689 is a deficient number, since it is larger than the sum of its proper divisors (8474837559551).

40643954402689 is a wasteful number, since it uses less digits than its factorization.

40643954402689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23663 (or 23652 counting only the distinct ones).

The product of its (nonzero) digits is 179159040, while the sum is 64.

The spelling of 40643954402689 in words is "forty trillion, six hundred forty-three billion, nine hundred fifty-four million, four hundred two thousand, six hundred eighty-nine".