64477833449 has 16 divisors (see below), whose sum is σ = 67966808832. Its totient is φ = 61046565888.

The previous prime is 64477833421. The next prime is 64477833481. The reversal of 64477833449 is 94433877446.

64477833449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64477833449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64477833499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6232409 + ... + 6242745.

It is an arithmetic number, because the mean of its divisors is an integer number (4247925552).

Almost surely, 2^64477833449 is an apocalyptic number.

It is an amenable number.

64477833449 is a deficient number, since it is larger than the sum of its proper divisors (3488975383).

64477833449 is a wasteful number, since it uses less digits than its factorization.

64477833449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13096.

The product of its digits is 48771072, while the sum is 59.

The spelling of 64477833449 in words is "sixty-four billion, four hundred seventy-seven million, eight hundred thirty-three thousand, four hundred forty-nine".