64540426352056 has 32 divisors (see below), whose sum is σ = 128667844872000. Its totient is φ = 30244885974016.

The previous prime is 64540426352033. The next prime is 64540426352099. The reversal of 64540426352056 is 65025362404546.

It is a junction number, because it is equal to n+sod(n) for n = 64540426351994 and 64540426352012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 992774941 + ... + 992839948.

It is an arithmetic number, because the mean of its divisors is an integer number (4020870152250).

Almost surely, 2^{64540426352056} is an apocalyptic number.

It is an amenable number.

64540426352056 is a deficient number, since it is larger than the sum of its proper divisors (64127418519944).

64540426352056 is a wasteful number, since it uses less digits than its factorization.

64540426352056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985615151 (or 1985615147 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 52.

The spelling of 64540426352056 in words is "sixty-four trillion, five hundred forty billion, four hundred twenty-six million, three hundred fifty-two thousand, fifty-six".