64651512287 has 16 divisors (see below), whose sum is σ = 68772067200. Its totient is φ = 60604109280.

The previous prime is 64651512281. The next prime is 64651512293. The reversal of 64651512287 is 78221515646.

It is an interprime number because it is at equal distance from previous prime (64651512281) and next prime (64651512293).

It is a cyclic number.

It is not a de Polignac number, because 64651512287 - 2⁴ = 64651512271 is a prime.

It is a super-2 number, since 2×64651512287² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64651512281) 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, 1727837 + ... + 1764857.

It is an arithmetic number, because the mean of its divisors is an integer number (4298254200).

Almost surely, 2^64651512287 is an apocalyptic number.

64651512287 is a deficient number, since it is larger than the sum of its proper divisors (4120554913).

64651512287 is a wasteful number, since it uses less digits than its factorization.

64651512287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38006.

The product of its digits is 806400, while the sum is 47.

The spelling of 64651512287 in words is "sixty-four billion, six hundred fifty-one million, five hundred twelve thousand, two hundred eighty-seven".