64857725243854 has 32 divisors (see below), whose sum is σ = 104351760099360. Its totient is φ = 30124743171072.

The previous prime is 64857725243827. The next prime is 64857725243911. The reversal of 64857725243854 is 45834252775846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17331429 + ... + 20738704.

It is an arithmetic number, because the mean of its divisors is an integer number (3260992503105).

Almost surely, 2^{64857725243854} is an apocalyptic number.

64857725243854 is a deficient number, since it is larger than the sum of its proper divisors (39494034855506).

64857725243854 is a wasteful number, since it uses less digits than its factorization.

64857725243854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38070804.

The product of its digits is 1806336000, while the sum is 70.

The spelling of 64857725243854 in words is "sixty-four trillion, eight hundred fifty-seven billion, seven hundred twenty-five million, two hundred forty-three thousand, eight hundred fifty-four".