6449946778507 has 8 divisors (see below), whose sum is σ = 6589609615872. Its totient is φ = 6310385188200.

The previous prime is 6449946778487. The next prime is 6449946778519. The reversal of 6449946778507 is 7058776499446.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6449946778507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6449946778547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25182969 + ... + 25437802.

It is an arithmetic number, because the mean of its divisors is an integer number (823701201984).

Almost surely, 2^{6449946778507} is an apocalyptic number.

6449946778507 is a deficient number, since it is larger than the sum of its proper divisors (139662837365).

6449946778507 is a wasteful number, since it uses less digits than its factorization.

6449946778507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50623529.

The product of its (nonzero) digits is 2560481280, while the sum is 76.

The spelling of 6449946778507 in words is "six trillion, four hundred forty-nine billion, nine hundred forty-six million, seven hundred seventy-eight thousand, five hundred seven".