64695299940 has 192 divisors, whose sum is σ = 207050995200. Its totient is φ = 16758461952.

The previous prime is 64695299939. The next prime is 64695299947. The reversal of 64695299940 is 4999259646.

64695299940 is a `hidden beast` number, since 6 + 4 + 69 + 529 + 9 + 9 + 40 = 666.

64695299940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (64695299947) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14163537 + ... + 14168103.

It is an arithmetic number, because the mean of its divisors is an integer number (1078390600).

Almost surely, 2^64695299940 is an apocalyptic number.

64695299940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64695299940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103525497600).

64695299940 is an abundant number, since it is smaller than the sum of its proper divisors (142355695260).

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

64695299940 is a wasteful number, since it uses less digits than its factorization.

64695299940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5331 (or 5323 counting only the distinct ones).

The product of its (nonzero) digits is 37791360, while the sum is 63.

The spelling of 64695299940 in words is "sixty-four billion, six hundred ninety-five million, two hundred ninety-nine thousand, nine hundred forty".