649601696379 has 16 divisors (see below), whose sum is σ = 869095558400. Its totient is φ = 431590330080.

The previous prime is 649601696377. The next prime is 649601696399. The reversal of 649601696379 is 973696106946.

It is not a de Polignac number, because 649601696379 - 2¹ = 649601696377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649601696377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 721797 + ... + 1349145.

It is an arithmetic number, because the mean of its divisors is an integer number (54318472400).

Almost surely, 2^649601696379 is an apocalyptic number.

649601696379 is a deficient number, since it is larger than the sum of its proper divisors (219493862021).

649601696379 is a wasteful number, since it uses less digits than its factorization.

649601696379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628530.

The product of its (nonzero) digits is 79361856, while the sum is 66.

The spelling of 649601696379 in words is "six hundred forty-nine billion, six hundred one million, six hundred ninety-six thousand, three hundred seventy-nine".