64840806632 has 48 divisors (see below), whose sum is σ = 149744915460. Its totient is φ = 26154272256.

The previous prime is 64840806617. The next prime is 64840806637. The reversal of 64840806632 is 23660804846.

It can be written as a sum of positive squares in 2 ways, for example, as 59538928036 + 5301878596 = 244006^2 + 72814^2 .

It is not an unprimeable number, because it can be changed into a prime (64840806637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4858343 + ... + 4871670.

Almost surely, 2^64840806632 is an apocalyptic number.

It is an amenable number.

64840806632 is an abundant number, since it is smaller than the sum of its proper divisors (84904108828).

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

64840806632 is a wasteful number, since it uses less digits than its factorization.

64840806632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9730050 (or 9730039 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 47.

The spelling of 64840806632 in words is "sixty-four billion, eight hundred forty million, eight hundred six thousand, six hundred thirty-two".