64953636993 has 40 divisors (see below), whose sum is σ = 110912262912. Its totient is φ = 37109202624.

The previous prime is 64953636983. The next prime is 64953636997. The reversal of 64953636993 is 39963635946.

64953636993 is a `hidden beast` number, since 6 + 4 + 9 + 536 + 3 + 6 + 9 + 93 = 666.

64953636993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64953636993 - 2⁵ = 64953636961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 64953636993.

It is not an unprimeable number, because it can be changed into a prime (64953636997) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4697496 + ... + 4711302.

Almost surely, 2^64953636993 is an apocalyptic number.

64953636993 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

64953636993 is a deficient number, since it is larger than the sum of its proper divisors (45958625919).

64953636993 is a wasteful number, since it uses less digits than its factorization.

64953636993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22123 (or 22114 counting only the distinct ones).

The product of its digits is 85030560, while the sum is 63.

The spelling of 64953636993 in words is "sixty-four billion, nine hundred fifty-three million, six hundred thirty-six thousand, nine hundred ninety-three".