649821050124 has 12 divisors (see below), whose sum is σ = 1516249116984. Its totient is φ = 216607016704.

The previous prime is 649821050111. The next prime is 649821050251. The reversal of 649821050124 is 421050128946.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27075877077 + ... + 27075877100.

It is an arithmetic number, because the mean of its divisors is an integer number (126354093082).

Almost surely, 2^649821050124 is an apocalyptic number.

It is an amenable number.

649821050124 is an abundant number, since it is smaller than the sum of its proper divisors (866428066860).

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

649821050124 is a wasteful number, since it uses less digits than its factorization.

649821050124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54151754184 (or 54151754182 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 649821050124 in words is "six hundred forty-nine billion, eight hundred twenty-one million, fifty thousand, one hundred twenty-four".