55004789961 has 135 divisors (see below), whose sum is σ = 95339582877. Its totient is φ = 31577253840.

The previous prime is 55004789893. The next prime is 55004789969. The reversal of 55004789961 is 16998740055.

The square root of 55004789961 is 234531.

It is a perfect power (a square), and thus also a powerful number.

55004789961 is a `hidden beast` number, since 5 + 500 + 4 + 78 + 9 + 9 + 61 = 666.

It is not a de Polignac number, because 55004789961 - 2¹⁵ = 55004757193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55004789898 and 55004789907.

It is not an unprimeable number, because it can be changed into a prime (55004789969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 534027036 + ... + 534027138.

Almost surely, 2^55004789961 is an apocalyptic number.

55004789961 is the 234531-st square number.

55004789961 is the 117266-th centered octagonal number.

It is an amenable number.

55004789961 is a deficient number, since it is larger than the sum of its proper divisors (40334792916).

55004789961 is a wasteful number, since it uses less digits than its factorization.

55004789961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 55004789961 in words is "fifty-five billion, four million, seven hundred eighty-nine thousand, nine hundred sixty-one".