64540425822207 has 4 divisors (see below), whose sum is σ = 86053901096280. Its totient is φ = 43026950548136.

The previous prime is 64540425822179. The next prime is 64540425822241. The reversal of 64540425822207 is 70222852404546.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64540425822207 - 2⁶ = 64540425822143 is a prime.

It is a super-2 number, since 2×64540425822207² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64540425822207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64540425822277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10756737637032 + ... + 10756737637037.

It is an arithmetic number, because the mean of its divisors is an integer number (21513475274070).

Almost surely, 2^{64540425822207} is an apocalyptic number.

64540425822207 is a deficient number, since it is larger than the sum of its proper divisors (21513475274073).

64540425822207 is a wasteful number, since it uses less digits than its factorization.

64540425822207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21513475274072.

The product of its (nonzero) digits is 8601600, while the sum is 51.

The spelling of 64540425822207 in words is "sixty-four trillion, five hundred forty billion, four hundred twenty-five million, eight hundred twenty-two thousand, two hundred seven".