64557243051245 has 32 divisors (see below), whose sum is σ = 89238464004096. Its totient is φ = 43916460033600.

The previous prime is 64557243051209. The next prime is 64557243051247. The reversal of 64557243051245 is 54215034275546.

It is not a de Polignac number, because 64557243051245 - 2⁶ = 64557243051181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64557243051247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70536410 + ... + 71445780.

It is an arithmetic number, because the mean of its divisors is an integer number (2788702000128).

Almost surely, 2^{64557243051245} is an apocalyptic number.

It is an amenable number.

64557243051245 is a deficient number, since it is larger than the sum of its proper divisors (24681220952851).

64557243051245 is a wasteful number, since it uses less digits than its factorization.

64557243051245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925481.

The product of its (nonzero) digits is 20160000, while the sum is 53.

The spelling of 64557243051245 in words is "sixty-four trillion, five hundred fifty-seven billion, two hundred forty-three million, fifty-one thousand, two hundred forty-five".