55634681 has 2 divisors, whose sum is σ = 55634682. Its totient is φ = 55634680.

The previous prime is 55634669. The next prime is 55634713. The reversal of 55634681 is 18643655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45104656 + 10530025 = 6716^2 + 3245^2 .

It is a cyclic number.

It is not a de Polignac number, because 55634681 - 2⁶ = 55634617 is a prime.

It is a super-2 number, since 2×55634681² = 6190435459943522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55234681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27817340 + 27817341.

It is an arithmetic number, because the mean of its divisors is an integer number (27817341).

Almost surely, 2^55634681 is an apocalyptic number.

It is an amenable number.

55634681 is a deficient number, since it is larger than the sum of its proper divisors (1).

55634681 is an equidigital number, since it uses as much as digits as its factorization.

55634681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 38.

The square root of 55634681 is about 7458.8659325664. The cubic root of 55634681 is about 381.7524802964.

The spelling of 55634681 in words is "fifty-five million, six hundred thirty-four thousand, six hundred eighty-one".