649719424 has 16 divisors (see below), whose sum is σ = 1294363170. Its totient is φ = 324859648.

The previous prime is 649719409. The next prime is 649719431. The reversal of 649719424 is 424917946.

649719424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 530473024 + 119246400 = 23032^2 + 10920^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2537839 + ... + 2538094.

Almost surely, 2^649719424 is an apocalyptic number.

649719424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

649719424 is a deficient number, since it is larger than the sum of its proper divisors (644643746).

649719424 is an equidigital number, since it uses as much as digits as its factorization.

649719424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5075947 (or 5075935 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The square root of 649719424 is about 25489.5944259614. The cubic root of 649719424 is about 866.1144484782.

It can be divided in two parts, 6497 and 19424, that added together give a square (25921 = 161²).

The spelling of 649719424 in words is "six hundred forty-nine million, seven hundred nineteen thousand, four hundred twenty-four".