64515071610 has 144 divisors (see below), whose sum is σ = 187501335840. Its totient is φ = 15374779200.

The previous prime is 64515071567. The next prime is 64515071641. The reversal of 64515071610 is 1617051546.

It is a happy number.

64515071610 is a `hidden beast` number, since 64 + 515 + 0 + 71 + 6 + 10 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 592305 + ... + 692715.

It is an arithmetic number, because the mean of its divisors is an integer number (1302092610).

Almost surely, 2^64515071610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64515071610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93750667920).

64515071610 is an abundant number, since it is smaller than the sum of its proper divisors (122986264230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64515071610 is a wasteful number, since it uses less digits than its factorization.

64515071610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100505 (or 100491 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 64515071610 in words is "sixty-four billion, five hundred fifteen million, seventy-one thousand, six hundred ten".