43898902649 has 16 divisors (see below), whose sum is σ = 50267051136. Its totient is φ = 37555056000.

The previous prime is 43898902631. The next prime is 43898902669. The reversal of 43898902649 is 94620989834.

It is a de Polignac number, because none of the positive numbers 2^k-43898902649 is a prime.

It is a super-2 number, since 2×43898902649² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43898902591 and 43898902600.

It is not an unprimeable number, because it can be changed into a prime (43898902609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9716339 + ... + 9720855.

It is an arithmetic number, because the mean of its divisors is an integer number (3141690696).

Almost surely, 2^43898902649 is an apocalyptic number.

It is an amenable number.

43898902649 is a deficient number, since it is larger than the sum of its proper divisors (6368148487).

43898902649 is a wasteful number, since it uses less digits than its factorization.

43898902649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6896.

The product of its (nonzero) digits is 26873856, while the sum is 62.

The spelling of 43898902649 in words is "forty-three billion, eight hundred ninety-eight million, nine hundred two thousand, six hundred forty-nine".