649634123061 has 24 divisors (see below), whose sum is σ = 1169903876544. Its totient is φ = 337472271360.

The previous prime is 649634123057. The next prime is 649634123071. The reversal of 649634123061 is 160321436946.

649634123061 is a `hidden beast` number, since 6 + 4 + 9 + 634 + 1 + 2 + 3 + 0 + 6 + 1 = 666.

It is not a de Polignac number, because 649634123061 - 2² = 649634123057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 649634122998 and 649634123016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649634123071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 468710796 + ... + 468712181.

It is an arithmetic number, because the mean of its divisors is an integer number (48745994856).

Almost surely, 2^649634123061 is an apocalyptic number.

It is an amenable number.

649634123061 is a deficient number, since it is larger than the sum of its proper divisors (520269753483).

649634123061 is a wasteful number, since it uses less digits than its factorization.

649634123061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937423001 (or 937422998 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The spelling of 649634123061 in words is "six hundred forty-nine billion, six hundred thirty-four million, one hundred twenty-three thousand, sixty-one".