649144761893 has 8 divisors (see below), whose sum is σ = 652588874496. Its totient is φ = 645706274400.

The previous prime is 649144761803. The next prime is 649144761899. The reversal of 649144761893 is 398167441946.

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 649144761893 - 2³² = 644849794597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649144761899) 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, 1174763 + ... + 1636568.

It is an arithmetic number, because the mean of its divisors is an integer number (81573609312).

Almost surely, 2^649144761893 is an apocalyptic number.

It is an amenable number.

649144761893 is a deficient number, since it is larger than the sum of its proper divisors (3444112603).

649144761893 is a wasteful number, since it uses less digits than its factorization.

649144761893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812555.

The product of its digits is 31352832, while the sum is 62.

The spelling of 649144761893 in words is "six hundred forty-nine billion, one hundred forty-four million, seven hundred sixty-one thousand, eight hundred ninety-three".