64857725103455 has 8 divisors (see below), whose sum is σ = 78125198909472. Its totient is φ = 51688894225888.

The previous prime is 64857725103433. The next prime is 64857725103463. The reversal of 64857725103455 is 55430152775846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64857725103455 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24660730664 + ... + 24660733293.

It is an arithmetic number, because the mean of its divisors is an integer number (9765649863684).

Almost surely, 2^{64857725103455} is an apocalyptic number.

64857725103455 is a deficient number, since it is larger than the sum of its proper divisors (13267473806017).

64857725103455 is a wasteful number, since it uses less digits than its factorization.

64857725103455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49321464225.

The product of its (nonzero) digits is 141120000, while the sum is 62.

The spelling of 64857725103455 in words is "sixty-four trillion, eight hundred fifty-seven billion, seven hundred twenty-five million, one hundred three thousand, four hundred fifty-five".