55816637 has 2 divisors, whose sum is σ = 55816638. Its totient is φ = 55816636.

The previous prime is 55816633. The next prime is 55816667. The reversal of 55816637 is 73661855.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51998521 + 3818116 = 7211^2 + 1954^2 .

It is a cyclic number.

It is not a de Polignac number, because 55816637 - 2² = 55816633 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55816594 and 55816603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55816633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27908318 + 27908319.

It is an arithmetic number, because the mean of its divisors is an integer number (27908319).

Almost surely, 2^55816637 is an apocalyptic number.

It is an amenable number.

55816637 is a deficient number, since it is larger than the sum of its proper divisors (1).

55816637 is an equidigital number, since it uses as much as digits as its factorization.

55816637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 41.

The square root of 55816637 is about 7471.0532724643. The cubic root of 55816637 is about 382.1682075842.

The spelling of 55816637 in words is "fifty-five million, eight hundred sixteen thousand, six hundred thirty-seven".