649711677 has 16 divisors (see below), whose sum is σ = 876143232. Its totient is φ = 428236800.

The previous prime is 649711619. The next prime is 649711681. The reversal of 649711677 is 776117946.

It is not a de Polignac number, because 649711677 - 2¹¹ = 649709629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649711277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102552 + ... + 108702.

It is an arithmetic number, because the mean of its divisors is an integer number (54758952).

Almost surely, 2^649711677 is an apocalyptic number.

It is an amenable number.

649711677 is a deficient number, since it is larger than the sum of its proper divisors (226431555).

649711677 is a wasteful number, since it uses less digits than its factorization.

649711677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6548.

The product of its digits is 444528, while the sum is 48.

The square root of 649711677 is about 25489.4424615369. The cubic root of 649711677 is about 866.1110060613. Note that the first 3 decimals are identical.

The spelling of 649711677 in words is "six hundred forty-nine million, seven hundred eleven thousand, six hundred seventy-seven".