649419849725 has 12 divisors (see below), whose sum is σ = 816311857236. Its totient is φ = 512418948480.

The previous prime is 649419849719. The next prime is 649419849779. The reversal of 649419849725 is 527948914946.

It can be written as a sum of positive squares in 6 ways, for example, as 133180473721 + 516239376004 = 364939^2 + 718498^2 .

It is not a de Polignac number, because 649419849725 - 2³⁸ = 374541942781 is a prime.

It is a super-2 number, since 2×649419849725² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177921422 + ... + 177925071.

It is an arithmetic number, because the mean of its divisors is an integer number (68025988103).

Almost surely, 2^649419849725 is an apocalyptic number.

It is an amenable number.

649419849725 is a deficient number, since it is larger than the sum of its proper divisors (166892007511).

649419849725 is a wasteful number, since it uses less digits than its factorization.

649419849725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355846576 (or 355846571 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 68.

The spelling of 649419849725 in words is "six hundred forty-nine billion, four hundred nineteen million, eight hundred forty-nine thousand, seven hundred twenty-five".