649255527789 has 32 divisors (see below), whose sum is σ = 970631859840. Its totient is φ = 382562611200.

The previous prime is 649255527769. The next prime is 649255527827. The reversal of 649255527789 is 987725552946.

649255527789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 649255527789 - 2²⁸ = 648987092333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649255527719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1411677 + ... + 1814205.

It is an arithmetic number, because the mean of its divisors is an integer number (30332245620).

Almost surely, 2^649255527789 is an apocalyptic number.

It is an amenable number.

649255527789 is a deficient number, since it is larger than the sum of its proper divisors (321376332051).

649255527789 is a wasteful number, since it uses less digits than its factorization.

649255527789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403901.

The product of its digits is 381024000, while the sum is 69.

The spelling of 649255527789 in words is "six hundred forty-nine billion, two hundred fifty-five million, five hundred twenty-seven thousand, seven hundred eighty-nine".