649657565927 has 8 divisors (see below), whose sum is σ = 665755449216. Its totient is φ = 633747962232.

The previous prime is 649657565897. The next prime is 649657565939. The reversal of 649657565927 is 729565756946.

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 649657565927 - 2¹² = 649657561831 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 (649657565327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47062913 + ... + 47076714.

It is an arithmetic number, because the mean of its divisors is an integer number (83219431152).

Almost surely, 2^649657565927 is an apocalyptic number.

649657565927 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

649657565927 is a deficient number, since it is larger than the sum of its proper divisors (16097883289).

649657565927 is a wasteful number, since it uses less digits than its factorization.

649657565927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94139797.

The product of its digits is 857304000, while the sum is 71.

The spelling of 649657565927 in words is "six hundred forty-nine billion, six hundred fifty-seven million, five hundred sixty-five thousand, nine hundred twenty-seven".