3989961055 has 16 divisors (see below), whose sum is σ = 4814529984. Its totient is φ = 3174289920.

The previous prime is 3989961049. The next prime is 3989961077. The reversal of 3989961055 is 5501699893.

It is not a de Polignac number, because 3989961055 - 2¹⁵ = 3989928287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3989960987 and 3989961005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1066969 + ... + 1070701.

It is an arithmetic number, because the mean of its divisors is an integer number (300908124).

Almost surely, 2^3989961055 is an apocalyptic number.

3989961055 is a deficient number, since it is larger than the sum of its proper divisors (824568929).

3989961055 is a wasteful number, since it uses less digits than its factorization.

3989961055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4866.

The product of its (nonzero) digits is 2624400, while the sum is 55.

The square root of 3989961055 is about 63166.1385158219. The cubic root of 3989961055 is about 1586.0719534639.

The spelling of 3989961055 in words is "three billion, nine hundred eighty-nine million, nine hundred sixty-one thousand, fifty-five".