649546281377279 has 8 divisors (see below), whose sum is σ = 763103323576272. Its totient is φ = 545073802554240.

The previous prime is 649546281377269. The next prime is 649546281377393. The reversal of 649546281377279 is 972773182645946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 649546281377279 - 2¹⁶ = 649546281311743 is a prime.

It is a super-2 number, since 2×649546281377279² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649546281377269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2271140843834 + ... + 2271140844119.

It is an arithmetic number, because the mean of its divisors is an integer number (95387915447034).

Almost surely, 2^{649546281377279} is an apocalyptic number.

649546281377279 is a deficient number, since it is larger than the sum of its proper divisors (113557042198993).

649546281377279 is a wasteful number, since it uses less digits than its factorization.

649546281377279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4542281687977.

The product of its digits is 7681443840, while the sum is 80.

The spelling of 649546281377279 in words is "six hundred forty-nine trillion, five hundred forty-six billion, two hundred eighty-one million, three hundred seventy-seven thousand, two hundred seventy-nine".