64858814557 has 8 divisors (see below), whose sum is σ = 67684778496. Its totient is φ = 62033351952.

The previous prime is 64858814551. The next prime is 64858814569. The reversal of 64858814557 is 75541885846.

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

It is a cyclic number.

It is not a de Polignac number, because 64858814557 - 2³¹ = 62711330909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64858814495 and 64858814504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64858814551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152143 + ... + 390979.

It is an arithmetic number, because the mean of its divisors is an integer number (8460597312).

Almost surely, 2^64858814557 is an apocalyptic number.

It is an amenable number.

64858814557 is a deficient number, since it is larger than the sum of its proper divisors (2825963939).

64858814557 is a wasteful number, since it uses less digits than its factorization.

64858814557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250667.

The product of its digits is 43008000, while the sum is 61.

The spelling of 64858814557 in words is "sixty-four billion, eight hundred fifty-eight million, eight hundred fourteen thousand, five hundred fifty-seven".