649696907019 has 8 divisors (see below), whose sum is σ = 866286154240. Its totient is φ = 433119465576.

The previous prime is 649696906981. The next prime is 649696907021. The reversal of 649696907019 is 910709696946.

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

It is not a de Polignac number, because 649696907019 - 2¹² = 649696902923 is a prime.

It is a super-2 number, since 2×649696907019² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649696907029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2822227 + ... + 3043740.

It is an arithmetic number, because the mean of its divisors is an integer number (108285769280).

Almost surely, 2^649696907019 is an apocalyptic number.

649696907019 is a deficient number, since it is larger than the sum of its proper divisors (216589247221).

649696907019 is a wasteful number, since it uses less digits than its factorization.

649696907019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5902889.

The product of its (nonzero) digits is 39680928, while the sum is 66.

The spelling of 649696907019 in words is "six hundred forty-nine billion, six hundred ninety-six million, nine hundred seven thousand, nineteen".