64651531335306 has 128 divisors (see below), whose sum is σ = 144426522341376. Its totient is φ = 19202399032320.

The previous prime is 64651531335277. The next prime is 64651531335353. The reversal of 64651531335306 is 60353313515646.

It is a super-2 number, since 2×64651531335306² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41922771 + ... + 43437561.

It is an arithmetic number, because the mean of its divisors is an integer number (1128332205792).

Almost surely, 2^{64651531335306} is an apocalyptic number.

64651531335306 is an abundant number, since it is smaller than the sum of its proper divisors (79774991006070).

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

64651531335306 is a wasteful number, since it uses less digits than its factorization.

64651531335306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515156.

The product of its (nonzero) digits is 8748000, while the sum is 51.

The spelling of 64651531335306 in words is "sixty-four trillion, six hundred fifty-one billion, five hundred thirty-one million, three hundred thirty-five thousand, three hundred six".