64397851 has 16 divisors (see below), whose sum is σ = 75271680. Its totient is φ = 53953920.

The previous prime is 64397831. The next prime is 64397863. The reversal of 64397851 is 15879346.

It is a cyclic number.

It is not a de Polignac number, because 64397851 - 2²³ = 56009243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64397798 and 64397807.

It is not an unprimeable number, because it can be changed into a prime (64397831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99210 + ... + 99856.

It is an arithmetic number, because the mean of its divisors is an integer number (4704480).

Almost surely, 2^64397851 is an apocalyptic number.

64397851 is a deficient number, since it is larger than the sum of its proper divisors (10873829).

64397851 is a wasteful number, since it uses less digits than its factorization.

64397851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954.

The product of its digits is 181440, while the sum is 43.

The square root of 64397851 is about 8024.8271632478. The cubic root of 64397851 is about 400.8271446503.

The spelling of 64397851 in words is "sixty-four million, three hundred ninety-seven thousand, eight hundred fifty-one".