54908961681 has 16 divisors (see below), whose sum is σ = 83738478464. Its totient is φ = 31351169664.

The previous prime is 54908961643. The next prime is 54908961721. The reversal of 54908961681 is 18616980945.

It is not a de Polignac number, because 54908961681 - 2¹⁹ = 54908437393 is a prime.

It is a super-2 number, since 2×54908961681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54908961641) 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, 1030900 + ... + 1082853.

It is an arithmetic number, because the mean of its divisors is an integer number (5233654904).

Almost surely, 2^54908961681 is an apocalyptic number.

It is an amenable number.

54908961681 is a deficient number, since it is larger than the sum of its proper divisors (28829516783).

54908961681 is a wasteful number, since it uses less digits than its factorization.

54908961681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115000.

The product of its (nonzero) digits is 3732480, while the sum is 57.

The spelling of 54908961681 in words is "fifty-four billion, nine hundred eight million, nine hundred sixty-one thousand, six hundred eighty-one".