64640083630 has 16 divisors (see below), whose sum is σ = 116614804464. Its totient is φ = 25797665920.

The previous prime is 64640083621. The next prime is 64640083631. The reversal of 64640083630 is 3638004646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64640083631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7291291 + ... + 7300150.

It is an arithmetic number, because the mean of its divisors is an integer number (7288425279).

Almost surely, 2^64640083630 is an apocalyptic number.

64640083630 is a deficient number, since it is larger than the sum of its proper divisors (51974720834).

64640083630 is a wasteful number, since it uses less digits than its factorization.

64640083630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14591891.

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 64640083630 in words is "sixty-four billion, six hundred forty million, eighty-three thousand, six hundred thirty".