64432433457247 has 4 divisors (see below), whose sum is σ = 64594731778696. Its totient is φ = 64270135135800.

The previous prime is 64432433457239. The next prime is 64432433457253. The reversal of 64432433457247 is 74275433423446.

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 64432433457247 - 2³ = 64432433457239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64432433457191 and 64432433457200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64432433457547) 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, 81149160129 + ... + 81149160922.

It is an arithmetic number, because the mean of its divisors is an integer number (16148682944674).

Almost surely, 2^{64432433457247} is an apocalyptic number.

64432433457247 is a deficient number, since it is larger than the sum of its proper divisors (162298321449).

64432433457247 is a wasteful number, since it uses less digits than its factorization.

64432433457247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162298321448.

The product of its digits is 162570240, while the sum is 58.

The spelling of 64432433457247 in words is "sixty-four trillion, four hundred thirty-two billion, four hundred thirty-three million, four hundred fifty-seven thousand, two hundred forty-seven".