64854418857 has 8 divisors (see below), whose sum is σ = 88483548384. Its totient is φ = 42230784288.

The previous prime is 64854418841. The next prime is 64854418861. The reversal of 64854418857 is 75881445846.

It is a happy number.

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

It is not a de Polignac number, because 64854418857 - 2⁴ = 64854418841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64854418857.

It is not an unprimeable number, because it can be changed into a prime (64854418807) 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, 251373588 + ... + 251373845.

It is an arithmetic number, because the mean of its divisors is an integer number (11060443548).

Almost surely, 2^64854418857 is an apocalyptic number.

It is an amenable number.

64854418857 is a deficient number, since it is larger than the sum of its proper divisors (23629129527).

64854418857 is a wasteful number, since it uses less digits than its factorization.

64854418857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502747479.

The product of its digits is 34406400, while the sum is 60.

The spelling of 64854418857 in words is "sixty-four billion, eight hundred fifty-four million, four hundred eighteen thousand, eight hundred fifty-seven".