649513774 has 32 divisors (see below), whose sum is σ = 1224631296. Its totient is φ = 251480160.

The previous prime is 649513771. The next prime is 649513807. The reversal of 649513774 is 477315946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649513771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29412 + ... + 46519.

It is an arithmetic number, because the mean of its divisors is an integer number (38269728).

Almost surely, 2^649513774 is an apocalyptic number.

649513774 is a deficient number, since it is larger than the sum of its proper divisors (575117522).

649513774 is a wasteful number, since it uses less digits than its factorization.

649513774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76000.

The product of its digits is 635040, while the sum is 46.

The square root of 649513774 is about 25485.5601076374. The cubic root of 649513774 is about 866.0230576277.

The spelling of 649513774 in words is "six hundred forty-nine million, five hundred thirteen thousand, seven hundred seventy-four".