64536851 has 4 divisors (see below), whose sum is σ = 66037752. Its totient is φ = 63035952.

The previous prime is 64536809. The next prime is 64536877. The reversal of 64536851 is 15863546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15863546 = 2 ⋅7931773.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64536851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64536751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750386 + ... + 750471.

It is an arithmetic number, because the mean of its divisors is an integer number (16509438).

Almost surely, 2^64536851 is an apocalyptic number.

64536851 is a deficient number, since it is larger than the sum of its proper divisors (1500901).

64536851 is a wasteful number, since it uses less digits than its factorization.

64536851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500900.

The product of its digits is 86400, while the sum is 38.

The square root of 64536851 is about 8033.4831175524. The cubic root of 64536851 is about 401.1153268082.

The spelling of 64536851 in words is "sixty-four million, five hundred thirty-six thousand, eight hundred fifty-one".