64511136530 has 8 divisors (see below), whose sum is σ = 116120045772. Its totient is φ = 25804454608.

The previous prime is 64511136523. The next prime is 64511136533. The reversal of 64511136530 is 3563111546.

It can be written as a sum of positive squares in 2 ways, for example, as 58029437449 + 6481699081 = 240893^2 + 80509^2 .

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

It is not an unprimeable number, because it can be changed into a prime (64511136533) 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, 3225556817 + ... + 3225556836.

Almost surely, 2^64511136530 is an apocalyptic number.

64511136530 is a deficient number, since it is larger than the sum of its proper divisors (51608909242).

64511136530 is a wasteful number, since it uses less digits than its factorization.

64511136530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6451113660.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 64511136530 in words is "sixty-four billion, five hundred eleven million, one hundred thirty-six thousand, five hundred thirty".