649711727418 has 32 divisors (see below), whose sum is σ = 1433510309952. Its totient is φ = 195035414400.

The previous prime is 649711727393. The next prime is 649711727449. The reversal of 649711727418 is 814727117946.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101577748 + ... + 101584143.

It is an arithmetic number, because the mean of its divisors is an integer number (44797197186).

Almost surely, 2^649711727418 is an apocalyptic number.

649711727418 is an abundant number, since it is smaller than the sum of its proper divisors (783798582534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649711727418 is a wasteful number, since it uses less digits than its factorization.

649711727418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203161950.

The product of its digits is 4741632, while the sum is 57.

The spelling of 649711727418 in words is "six hundred forty-nine billion, seven hundred eleven million, seven hundred twenty-seven thousand, four hundred eighteen".