649928577 has 8 divisors (see below), whose sum is σ = 867184416. Its totient is φ = 432979232.

The previous prime is 649928567. The next prime is 649928621. The reversal of 649928577 is 775829946.

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 649928577 - 2⁴ = 649928561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649928527) 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, 71628 + ... + 80189.

It is an arithmetic number, because the mean of its divisors is an integer number (108398052).

Almost surely, 2^649928577 is an apocalyptic number.

It is an amenable number.

649928577 is a deficient number, since it is larger than the sum of its proper divisors (217255839).

649928577 is a wasteful number, since it uses less digits than its factorization.

649928577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153247.

The product of its digits is 7620480, while the sum is 57.

The square root of 649928577 is about 25493.6968092115. The cubic root of 649928577 is about 866.2073762835.

The spelling of 649928577 in words is "six hundred forty-nine million, nine hundred twenty-eight thousand, five hundred seventy-seven".