7898408649 has 12 divisors (see below), whose sum is σ = 11595843012. Its totient is φ = 5179284000.

The previous prime is 7898408629. The next prime is 7898408663. The reversal of 7898408649 is 9468048987.

It can be written as a sum of positive squares in 2 ways, for example, as 4350062025 + 3548346624 = 65955^2 + 59568^2 .

It is not a de Polignac number, because 7898408649 - 2⁸ = 7898408393 is a prime.

It is a super-3 number, since 3×7898408649³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (7898408629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7192902 + ... + 7193999.

It is an arithmetic number, because the mean of its divisors is an integer number (966320251).

Almost surely, 2^7898408649 is an apocalyptic number.

It is an amenable number.

7898408649 is a deficient number, since it is larger than the sum of its proper divisors (3697434363).

7898408649 is a wasteful number, since it uses less digits than its factorization.

7898408649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14386968 (or 14386965 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 63.

The square root of 7898408649 is about 88872.9916735113. The cubic root of 7898408649 is about 1991.4979629805.

The spelling of 7898408649 in words is "seven billion, eight hundred ninety-eight million, four hundred eight thousand, six hundred forty-nine".