64340147309 has 4 divisors (see below), whose sum is σ = 64348725504. Its totient is φ = 64331569116.

The previous prime is 64340147273. The next prime is 64340147323. The reversal of 64340147309 is 90374104346.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64340147309 - 2²⁸ = 64071711853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64340147009) 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, 4277837 + ... + 4292850.

It is an arithmetic number, because the mean of its divisors is an integer number (16087181376).

Almost surely, 2^64340147309 is an apocalyptic number.

It is an amenable number.

64340147309 is a deficient number, since it is larger than the sum of its proper divisors (8578195).

64340147309 is an equidigital number, since it uses as much as digits as its factorization.

64340147309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8578194.

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 64340147309 in words is "sixty-four billion, three hundred forty million, one hundred forty-seven thousand, three hundred nine".