64855851 has 8 divisors (see below), whose sum is σ = 86529024. Its totient is φ = 43209960.

The previous prime is 64855841. The next prime is 64855853. The reversal of 64855851 is 15855846.

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

It is not a de Polignac number, because 64855851 - 2⁶ = 64855787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64855853) 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, 411 + ... + 11396.

It is an arithmetic number, because the mean of its divisors is an integer number (10816128).

Almost surely, 2^64855851 is an apocalyptic number.

64855851 is a deficient number, since it is larger than the sum of its proper divisors (21673173).

64855851 is a wasteful number, since it uses less digits than its factorization.

64855851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13641.

The product of its digits is 192000, while the sum is 42.

The square root of 64855851 is about 8053.3130449524. The cubic root of 64855851 is about 401.7751335158.

The spelling of 64855851 in words is "sixty-four million, eight hundred fifty-five thousand, eight hundred fifty-one".