64273427449 has 48 divisors (see below), whose sum is σ = 86177433600. Its totient is φ = 47270109600.

The previous prime is 64273427437. The next prime is 64273427473. The reversal of 64273427449 is 94472437246.

It is not a de Polignac number, because 64273427449 - 2⁵ = 64273427417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64273427396 and 64273427405.

It is not an unprimeable number, because it can be changed into a prime (64273427479) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2763732 + ... + 2786890.

It is an arithmetic number, because the mean of its divisors is an integer number (1795363200).

Almost surely, 2^64273427449 is an apocalyptic number.

It is an amenable number.

64273427449 is a deficient number, since it is larger than the sum of its proper divisors (21904006151).

64273427449 is a wasteful number, since it uses less digits than its factorization.

64273427449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23474 (or 23467 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 52.

The spelling of 64273427449 in words is "sixty-four billion, two hundred seventy-three million, four hundred twenty-seven thousand, four hundred forty-nine".